Basilicos: Not actually related to basilisks. A great, multi-ton venomous serpent with a magical stone set just above the eyes. All who behold the stone will find themselves paralyzed, and shortly thereafter, devoured. The stone does not function on its own once removed from the serpent, but has immense resale value with enchanters and alchemists. The young can petrify with their venom, but this is a defensive feature they grow out of.
Basilisk: When a rooster mates with a toad and lays an egg, you end up with a cranky, venomous reptile the size of a crocodile whose gaze can turn its victims to stone. Basilisks aren't sterile, and are possible hermaphroditic. The hide makes excellent armor if you have access to a master leather-worker.
Benirya: A hippo-sized hand scurrying about with a massive uruk's head attached at the wrist. The tusks can extend for many yards to impale prey and draw it in. Carnivorous to the extreme, and occasionally possessed of speech. Their ancestors were probably the result of a Spring of the Myst mishap, or escaped from a Doomfold Dungeon.
Bison: Shaggy herbivores found in the Tikume Plains. While not bright as herd animals go, and lacking any ability to jump, they are temperamental, and gather in herds of several thousand.
Blade Rabbit: The smaller, faster, meaner cousin of the Hornhare. A forty pound bunny with an Arkansas Toothpick emerging from its forehead. Not as tasty as its more common relations, but hey, free short-sword! One of Kring tribesman rites of passage is to hunt and collect a blade of one's own. Fortunately, there do not appear to be Royal Blade Rabbits.
Blood Soul: A semi-aquatic creature found on the coasts of Asteria and the Hazad Caliphate. Resembles a nightmarish mashup of jellyfish and lionfish, in blood red. They can both fly and swim, but requires several minutes to inflate or deflate their flotation bladder. A single blood soul can inflict multiple kinds of poisonous effects upon its prey.
Buel: A strange monster found in the mountains surrounding the Uruk Mandarinate. A giant black tiger's head, with three bat like wings, and three mantis claws. Nearly immune to true magic, best fought with fighting techniques.
Boar, Wild: 200 to 500 pounds of angry bacon, with tusks an Uruk warrior can only dream of, a wiry coat, a startling charge, brains, and a sense of smell that makes the forest truffles its territory. Do not underestimate one of these beasts, unless you want to see your entrails littering the glade.
Boar, Wirehair: Two to five tons of porcine rage, armored with a literal coat of metal hairs. The copper, brass, bronze, iron and steel ones are bad enough, but the silverhair boars natively use Thunder magic, the Goldhair ones use Light magic, and the legendary mithrilhair boar of the Greatfyre Desert is purported to be capable of summoning the Terrestrial Spirit Gorgon to assist it in combat. Generally found anywhere north of the Caliphate.
Bomb: A manic appearing jack-o-lantern looking creature that drifts about a few feet above the ground. Attracted to movement and body heat, once it finds a victim at least the size of a deer (or a dwarf), it will charge, and bash itself against it's foe until it sustains enough damage, then explodes. Apparently a form of fungus, it depends on the survivors to carry its spores into new territories. There's always a market for intact Bomb cores with alchemists, and to date no mage school, not even House Metamorphos, will admit to creating them in the first place.
Bug, Giant: You name it, there's probably a giant version of it out there someplace. Most giant bugs are in the pig to cow size range, and usually found in the Underdark. Before you feel safe in your surface-dwelling lifestyle, note the qualifiers in that previous sentence.
Bumblebee, Blue: Roughly the size of a large guinea pig. Rather even tempered, these giant insects can be domesticated, though only the queens respond to familiar-binding magics. raised primarily for the beeswax, which burns with a bright, pleasant smelling flame. Their honey has an unfortunate flavor that is only palatable to themselves, Uruks, and Hexbears.