Raiders of the Lost Tomb
Grungs are aggressive froglike humanoids found in rain forests and tropical jungles. They are fiercely territorial and see themselves as superior to most other creatures.
Tree-Dwelling Amphibians. Grungs live in trees and prefer shade. A grung hatchery is maintained in well-guarded
ground-level pools. About three months after hatching, a grung tadpole takes on the shape of an adult. It takes another six to nine months for a grung juvenile to reach maturity.
Castes and Colors. Grung society is a caste system. Each caste lays eggs in a separate hatching pool, and juvenile grungs join their caste upon emergence from the hatchery. All grungs are a dull greenish gray when they are born, but each individual takes on the color of its caste as it grows to adulthood.
Naturally Toxic. All grungs secrete a substance that is harmless to them but poisonous to other creatures. A grung also uses venom to poison its weapons.
Slavers. Grungs are always on the lookout for creatures they can capture and enslave. Grungs use slaves for all manner of menial tasks, but mostly they just like bossing them around. Slaves are fed mildly poisoned food to keep them lethargic and compliant. A creature afflicted in this way over a long period of time becomes a shell of its former self and can be restored to normalcy only by magic.