Some Grung to use as characters and NPC's for your D&D campaigns!
In Dungeons & Dragons (D&D), a Grung is a froglike humanoid typically found in rain forests and tropical jungles. They have an affinity for poison, being immune to it and also having posionous skin that is dangerous for anything that comes into direct contact with them.
GRUNG
For a really good introduction into the wonderful world of D&D check out the Official Dungeons & Dragons Intro Adventure Set!