Gelatinous Icosahedron

 Before we had golems in the Expert Set, the Basic Set gave us living statues. There are some similarities, but also some important differences, in particular some tantalizing hints that living statues might, unlike golems, actually possess a degree of human-like intelligence and free will, and we'll get to those a bit later. We start off the monster description with the declaration that a living statue is an enchanted animated creature made by a powerful wizard. So, it isn't natural, and it doesn't arise spontaneously (at least under normal circumstances.) That's a strong point of commonality with golems. A living statue may be of any size and any material, but only three are listed. What, exactly, this statement implies is not explored, but it would seem reasonable to assume that the stats listed for the three forms represent roughly man-sized statues, and that larger or smaller ones might have more or fewer Hit Dice and inflict larger or smaller amounts of damage. Fi...

 Today's monster, the giant leech, is one I've never used, nor been tempted to use in play. I'll get to why a bit later, but first, let's look at the stats and write-up as given in the Expert Rules. The monster is described as a swamp-dwelling, three- to four-foot sluglike creature. A giant leech has a listed AC of 7, equal to leather armor, which probably represents a rubbery hide. It has a whopping 6 Hit Dice, which puts it on par with tigers, minotaurs, caecilians, polar bears, and white dragons, hit points-wise. Not gonna lie, that's a lot of beef. It moves at a rate of 90' (30') which is quite brisk for a big slab of worm-slug. Its damage of 1-6 points per attack is not exactly massive, but once it hits, it hangs on and sucks blood for an additional 1-6 every round, and only killing the leech will detach it and stop the bleeding. Its morale of 10 is presumably only to be used before the creature latches onto a victim, making it very unlikely to give up ...

  The classic Erol Otus kobold.  There might not be a more iconic staple monster of low-level play than the kobold. Curiously, kobolds get a lot more extensive write-up in the Basic Rules than many other monsters, such as goblins. Kobolds have been depicted in a variety of ways in D&D, but in B/X they're describes as small, scaly, rust-brown, hairless, and dog-like. Perhaps the adjective "scaly" contributed to their later portrayal as little dragon-men, a model I personally find cheesy and stupid. I imagined "scaly" more like a skin condition such as mange. Folklore tends to lump them in with goblins and dwarfs, and it wouldn't be a huge stretch to depict them as ugly, gnarled little bearded men, or even combining that with the dog-like appearance of B/X tradition.  Setting aside attempts to make them truly formidable and fearsome opponents (e.g. "Tucker's kobolds"), kobolds in their basic form are individually quite weak. Their AC is equal...

 One monster that captured my interest right away was the killer bee from the Basic Set. I'm not really sure why, exactly, but when I set out to expand the outdoor map from B2, one of the first encounter areas I wrote up was a hive of killer bees. I'd like to note that in the next revision of the rules, the Frank Mentzer-edited Basic Set, the killer bee was listed simply as "Bee, Giant." Same monster, same stats, but "killer bee" suggests something more than just a big honeybee -- it's aggressive and fearsome. It's a killer . Anyway... Killer bees are a bit odd among the critters of the D&D bestiary. They're described as being one foot long, which is gigantic relative to normal bees and other insects, but not stupidly large. They're not hard to kill, having AC 7 and only 1/2 Hit Die, but they are not an encounter to be taken lightly, even by mid-level PCs. Why? Because every successful attack features a save-or-die poison. Your 4th-level ...

 The invisible stalker... a monster I have never, ever used in any game I've run or played in. Let's see if that was reasonable, or a missed opportunity. An invisible stalker pursuing its quarry through ancient ruins. Invisible stalkers appear only due to being summoned by a magic-user with a powerful spell. The stalker is a formidable creature, having an AC equal to plate armor and 8 Hit Dice, just one fewer than an elephant. It moves at the same rate as an unencumbered human, 120' (40'). Its single attack deals an impressive 4-16 (4d4) points of damage. And its morale is 12 -- it doesn't give up, ever, until it's slain or dispelled back to its home plane. (In other editions, this is specified as the Elemental Plane of Air, but in B/X, it could be any place the DM wishes.) Only a single one is encountered a time. The signature characteristic of invisible stalkers, is, of course, invisibility, but this literally goes completely unremarked in the monster descript...

 Here's another "monster" that is wildly underappreciated and underutilized: the insect swarm, from the Basic Rules. I don't think I've ever used one myself, neither back in the day nor more recently, which is kind of a shame. Let's get into it and see what sort of possibilities such an unconventional monster entry lends itself to. According to the book, an insect swarm may be comprised of various types of insects (or other arthropods such as spiders), either crawling, flying, or both. (Presumably a single swarm is composed of a single type of creature, though.) The swarm has an Armor Class of 7, which is mediocre but still better than an unarmed human, perhaps because of the decentralized nature of the swarm. There's just not a coherent "body" to strike against. In fact, because of the other curious mechanics of the insect swarm, this number is completely, entirely irrelevant; it will never be used in play. The swarm effectively has 2-4 Hit Dice...

 The hydra is a monster with deep roots in Greek myth. Like many D&D creatures portrayed as whole types or species, the hydra, too was once unique. It was a many-headed serpent, reputed to have poisonous breath and blood so toxic even the scent of it was deadly, with later incarnations of the myth adding the regeneration of two heads for each one severed. The slaying of the hydra served as the second of the mythic Labors of Hercules.  The standard D&D hydra is toned down a bit from the myth. Though it's a tough beast to be sure, it can be slain by heroes of less than demigod status. The book describes it as having a dragon-like body (minus wings) and 5 to 12 snake-like heads.  The hydra is a bit of an odd duck, mechanically. Its AC of 5 is decent. It has 1d8+4 heads, with 1 HD and 8 hit points for each one. That makes it quite a bit tougher than other monsters of the same HD, on average, since it always has maximum hp. Compare a 10-headed hydra with 80 hp to a typ...

 Horses are one of those entries in the B/X bestiary that exists not because they're interesting as monsters, but because they're creatures that are useful to characters. They're essentially living pieces of equipment, but as such, they need stats like monsters. The book breaks them down into three broad categories: riding, draft, and war. All three have a base AC of 7, which is pretty standard for most animals with no predatory inclinations or particular affinity for combat. Everything else is different among them. Riding horses are the standard we're most familiar with in our modern world. Their purpose is to be sat on and take their riders places. They're capable of a very brisk pace of 240' (80'), or twice the speed of an unencumbered human, and can maintain that speed while carrying up to 3,000 coin weight (300 pounds), including the rider. They can carry up to 600 pounds at half speed, which is still a very respectable 120' (40'). (More on this...

 Well, it's been a few seconds since I last felt inspired to write and post here, but here I am again. An A to Z Monster post feels like a good way to ease back into the flow. We come now to another perennial staple of low-level play: the hobgoblin.  Hobgoblins are described as bigger and meaner relatives of goblins, presumably with a similar appearance (e.g. chalky tan to livid grey complexion, red eyes, etc.) though that is not explicitly stated. Though they live underground, they are able to function in full daylight without penalty, unlike goblins. Mechanically, hobgoblins are exactly what it says on the tin. Their AC of 6 is equal to a goblin, while their 1+1 HD give them an extra couple of hp on average. They are slightly faster at 90' (30') (compared to 60' (20') for goblins), and a bit braver with a Morale score of 8 (vs. the goblin's 7). Their damage is listed as "1-8 or by weapon," so it's implied that they wield swords or perhaps battle ...

 Next up, another creature with firm roots in the fertile soil of real world mythology: the hippogriff. The Classical world certainly did love its animal hybrids. The hippogriff, a beast with the front parts and wings of an eagle and the hind parts of a horse, is a prime example. The entry in the Expert Rules is one of the shortest in all of B/X, and by extension, in all of D&D, at a mere four sentences. The first describes the creature's appearance, the second notes that it can be tamed and ridden, the third briefly expounds on its natural enemy relationship with the pegasus, and the fourth states that it nests in rocky crags. That's the full extent of it.  Stats-wise, the hippogriff is a moderately formidable opponent. Its AC of 5 and 3+1 Hit Dice are fairly stout, a little better than the average war horse. It is a swift flyer, at a movement rate of 360' (120') and somehow it manages to run almost as fast as a good horse on its eagle-talon forelegs. It's able...

 Time for another monster! We're still working through the H-critters, and next up is the hellhound. By the book, a hellhound is a large canine monster, reddish-brown in color and the size of a small pony ("That's quite strong, that is!" -- Eddie Izzard). It is impervious to normal fire, and highly intelligent (saving as a fighter of its full HD rather than half), often dwelling either deep in dungeons or in hot, fiery places such as volcanoes, and consorting with fire giants and other fire-loving creatures. Mechanically, the hellhound is a bit odd. Its Armor Class of 4 is quite a bit tougher than one would expect. Its Hit Dice run anywhere from 3 to 7; apparently whoever designed the monster either wanted it to be flexible with regard to the levels of parties it could be used against, or to create uncertainty for players, or perhaps both. Its physical attack is a pretty standard bite for 1-6 damage. Its movement seems a bit slow and lumbering at 120' (40'), e...

 It seems fitting, after the harpy, to focus on another creature of wing and feather, this time one of a more natural and less malevolent persuasion. I give you the hawk. We all know what hawks are, so there's no need to recapitulate that here, even though the monster entry in fact does describe what a hawk is. What is of note is that all hawks do double damage on their first attack if they surprise their targets. Two varieties are detailed, normal and giant. It is noted that normal hawks won't attack human-sized or larger targets unless they appear unable to defend themselves. (It seems extremely unlikely that they'd attack even halfling-size creatures unless for the same reasons or maybe in cases of desperate hunger.) Their stats, AC 8, 1/2 Hit Die, and 1-2 damage per attack, bear this out pretty soundly. Their movement rate is an impressive 480' (160'), though, and their Morale of 7 is decent. It's the giant hawk you might need to watch out for, especially if...

 Here's a monster that seems to be the product of a mashup between two very similar mythical creatures: the harpy. Mythological harpies are hybrids of women and birds who were traditionally associated with storm winds. Some early incarnations describe their human aspects as attractive, but mostly they were held to be quite repugnant. So far, it matches pretty closely with the D&D harpy. What it's missing is a song that can charm humans. That ability is traditionally associated with another mythical being, the siren. While sirens in later years are usually thought of as mermaid-like creatures with the lower bodies of fish, in their earlier incarnations they were described as having the faces of women, and the bodies, feet, and wings of birds. The D&D harpy is described more specifically than either, having the lower body of a giant eagle and the upper body and head of a hideous woman.  Stats-wise, harpies are pretty formidable opponents for Basic-level parties. Their AC...

 We've finished off the Gs, so let's start the Hs, with another PC-as-monster entry: the halfling. These entries in the B/X bestiary tend to be brief, and the halfling is no exception to that trend, weighing in at a mere four sentences plus the obligatory stat block. By the stats, halflings are not very threatening, having a mediocre AC of 7 (Is it leather? Is it a shield and a +1 Dex bonus? Who knows?), 1-1 HD, 90' (30') movement, damage by weapon, and Morale of 7. It's interesting to note they have by far the highest dungeon Number Appearing of any PC-as-monster type, at 3-18, well ahead of Veteran at 2-8, and are tied for wilderness Number Appearing with dwarves at 5-40. It is also noteworthy that their wilderness "lair" (i.e. village) explicitly disregards the standard rule of thumb of five times the listed number appearing (25-200 in this case) with an alternate number of 30-300. A village will have a leader of level 2-7 and a village guard of 5-20 in...

 Crawling up out of the slime and taking to the skies! The griffon is next on our alphabetical exploration of the monster lists. Griffons have a pretty extensive pedigree in real-world mythology, having roots all the way back to ancient Mesopotamia. The monster is usually depicted as having the body, tail, and hind legs of a lion and the head, forelegs, and sometimes wings of an eagle. (Wings, of course, are a vital feature of the D&D iteration of the beast.) At least one scholar wrote of griffons that they are "enemies of horses", a tidbit enthusiastically seized upon by D&D's authors. The D&D griffon is a pretty formidable creature. The rulebook entry describes it as a voracious predator, and it has the stats to fill that role quite admirably. Its AC is a medium-tough 5 and its 7 Hit Dice make it bigger and tougher than the lion from which it derives (pardon the word play) the lion's share of its physical form. It can dish out an impressive amount of dam...

 We'll roll with the slimy theme for another post, because the next monster is the ever-popular Green Slime. Stats-wise, green slime doesn't look like much. It doesn't even have a proper AC (it can always be hit). It's a bit tougher than a typical 1st-level character, at 2 HD, it moves at a glacial 3' (1'), it doesn't do hit point damage at all, and you'll only encounter a single one at a time. For all that, though, green slime is a deadly threat to the naive and unwary.  It "attacks" by dripping from a ceiling or wall onto a victim, or by being stepped in if on a floor. A fiendish DM might place it in other locations which characters will be tempted to unwittingly touch it. The description says nothing about whether the creature needs to make an attack roll at all; certainly I wouldn't require one for stepping in/touching the slime, but I might make a roll vs. AC 9 for a drip attack. In any case, the slime can dissolve wood and metal in 6 ...

 Slime time! Our monster today is the gray ooze from the Basic Set. Despite the sheer bulk of the black pudding, the gray ooze may well be the most dangerous of the slimes and oozes I've covered so far. Gray ooze is said to look like wet stone, making it difficult to see. One might well expect a bonus to surprise opponents because of that, but apparently it's only a flavor detail here, not something to be represented mechanically. That might be just as well, considering... The monster's stats don't immediately impress: its AC of 8 makes it easy to hit, and 3 Hit Dice, while a lot for Basic-level parties, doesn't take too long to whittle down. If you can stay alive long enough, that is, because this thing is bringing some serious hurt. A gray ooze secretes powerful acid that inflicts 2-16 points of damage on a successful attack. After that, it does 2-16 points per round automatically, in addition to automatically destroying non-magical armor. (Magical armor can hold ...

 And for its next trick, B/X Dungeons & Dragons will split one monster into two! In Greek mythology, Medusa was the name of a specific, unique being, one of the three Gorgon sisters (the others being Stheno and Euryale). In D&D, though, medusa and gorgon are separate and very different creature types, united by the common theme of petrification attacks. The D&D medusa is based on the mythical Gorgon, Medusa, while the D&D gorgon is based on... livestock. The gorgon is described as a magical, bull-like monster covered in iron scales. (Random digression: What happens when a gorgon and a rust monster fight? Inquiring minds want to know!) It has large horns, with which it gores opponents, and has the ability to charge for double damage. Gorgons are usually found in small numbers (1-4 appearing) in foothills and grasslands. Befitting its hide of iron scales, the gorgon has a very solid AC of 2, and 8 Hit Dice, making it nearly as robust as an elephant but even harder to ...

 The word "golem" in D&D seems to be almost a catch-all for any sort of enchanted automaton. (Though there are exceptions, such as gargoyles and living statues, though why they are exceptions there is not even the barest attempt to explain... but I digress.) Monsters and Manuals had an excellent post arguing that the catch-all concept of golems is overly broad, if not straight-up incorrect, and I concur: it dilutes what it really means for something to be a golem, and destroys a lot of the flavor of the thing. A golem, according to noisms, must be humanoid in form, it must be made of "raw material" (no finished or worked material such as stained glass or steel, nor anything that's ever been alive such as wood), and it must be unfinished, implying a degree of roughness or crudeness in form, e.g. it hasn't been completed as a statue or other work of art or technology before being animated as an automaton. I like these criteria tremendously, and they defi...

 When I think back to my earliest days playing D&D, the monster I think of most isn't the dragon. It isn't the orc, the gelatinous cube, or the ogre. It's the goblin, from the Basic Set, naturally. Goblins are stated to be small, incredibly ugly human-like creatures. How small, exactly, isn't specified; they could be dwarf-size, halfling-size, or smaller, depending on how you like your goblins. The entry does tell us that they have red eyes that glow in low light, and pale earth-colored skin, "chalky tan" and "livid gray" being given as examples. They're identified as avowed underground-dwellers, with infravision to a 90' range. Full daylight hurts their eyes, and they fight at a -1 penalty. They hate dwarves so fiercely that they will always attack them on sight, so no negotiating with goblins if there's a dwarf in the party! There's also a 20% chance that one in four goblins encountered will be riding dire wolves, which substant...