Thousand Teeth the Devourer

Thousand Teeth is an ancient crocodilian nightmare that has served as the apex predator in the swamps near Saltmarsh for as long as anyone can remember. This monster recently fought a number of lizardfolk and lost one of its teeth. Angered and hungry, it sulked in its lair, lost in primal dreams of rending and tearing.
The Adventurer's Association recently slayed Thousand Teeth as a favor to the tribe of lizardfolk occupying the old lizardfolk fortress near Saltmarsh.