The best frog monsters for Dungeons and Dragons 5e are:īullywugs are small frog-like humanoids that inhabit swamps, marshes and watery caves. They range in size and shape from small humanoids to colossal monstrosities. From poisonous skin and gas to sticky, grappling tongues and oversized gullets, these amphibious ambushers can add a challenging encounter in swamps, forests and elemental planes. Frog monsters can be found across many different Dungeons and Dragons 5e environments and pose a unique threat to the party.