Hungry Little Monsters -- Quick Summary

Ashen Hound: a necromancer's guardian beast
Bellflower Vine: An entangling plant with sleep poison.
Bogeyman: A gremlin-like creature that feeds on fear.
Bound: An undead spirit trapped in its own corpse.
Canker Zombie: A plague-killed undead whose attacks never heal.
Cannibal Doppelganger: A shapechanger that imitates the creatures it eats.
Chalk Guardian: A fey creature bound to guard a sacred location.
Courier Tree: A tree with pollen that convinces victims to carry its seeds away.
Crimson Horror: A weak fear-causing demon that attacks in numbers.
Electric Leech: A primitive animal with electrical powers.
Ethereal Lasher: A bizarre predator from the Ethereal Plane.
Famine Sprite: A filthy little fey that spreads disease and sometimes swarms.
Fraslan Grizzly: A cold-native bear with an icy gaze.
Frostbit: A treacherous elemental that deceives with its appearance.
Fruss Owlbear: A variant owlbear capable of limited flight.
Harrowing Elder: An angry plant guardian of ancient forests.
Hemogoblin: A fast-healing goblin with poison blood.
Keening Maw: The still-living husk of a harrowing elder.
Kyokan: An even larger undead variety of the giant squid.
Medulla: A multiheaded demonic enforcer.
Menneskelig: A balor-like demonic mercenary.
Molder Serpent: A poisonous snake whose slain victims decompose quickly.
Nethermold: An evil mold that grows in areas high in negative energy.
Plague Troll: A sickly troll with a bite that carries a wasting sickness.
Pupylaen: A demon-tainted formian spawn.
Pyrefly: Fire-breathing insects, some large, some swarming.
Pyrite Dragon: A gold dragon raised and altered by a trickster god.
Quicksilver Ooze: A metallic ooze that eats magic.
Ravener: A single-minded bearlike predator.
Rot Weevil: A colony insect that infests corpses as a vehicle and shelter.
Scaurgar: A sorcerer hydra that uses cooperative spellcasting.
Skinner Ooze: An intelligent ooze-like humanoid.
Skulldrake Stalker: A construct built around a dragon's skull.
Sleeyk Owlbear: A faster but weaker owlbear variant.
Soulgaunt: A luck-suppressing undead that arises from the site of a horrible accident.
Stoneclaw: A scorpionlike stone construct.
Sugareater: A sticky plant that sucks the fluids from creatures to create guardians for itself.
Tangleroot Skeleton: A servant of nature reanimated as a plant creature.
Tar Ooze: A sticky ooze creature that ensnares its victims.
Tree Rat: Normal and dire varieties of a poisonous squirrel-like creature.
Vain Dead: An undead creature with a perfect body and rotting face.
Vaporhound: A mastiff infused with elemental fire and air.
Xoan: A draconic race totally subservient to emotions.