The Gliomor

An albino leviathan older than the Fen itself, indifferent to whether you live or drown.

Solitary, large, cautious, terrifying, ancient. The Gliomor is an enormous albino crayfish, older than Ferrier's Fen itself. If you encounter it, pray that it is not hungry; the Fen gives little reason to expect that mercy.

HP 22 · Armor 3

Smaller claw d12+3 (reach, grabby)
Bigger claw d12+5 with advantage (reach, forceful, messy, 3 piercing)

Instinct: To eat pretty much anything

Special qualities

heals injuries in a few hours
regenerates limbs in a few days

Moves

Poke its eyestalks out of the water or above grass
Burst into view, making the mind reel with horror
Scuttle back quickly, to escape danger or to drag off prey
Spew forth a cloud of sickening, blinding, corrosive goo: d8 damage (area, close)