Grungs are an obscure Dungeons and Dragons monster that disappeared from the game for several editions before reappearing in Volo's Guide to Monsters. Somebody at Wizards of the Coast had a wild idea to run a game of Tomb of Annihilation where all of the PCs were grungs, and wrote a supplement for Tomb of Annihilation called One Grung Above which gave PC stats to grungs. Grungs are anthropomorphic poison frogs. Like Bullywugs only much cuter and more colorful. They are mostly lawful evil, having a strict social caste system based on skin color, with anything that isn't a grung at the bottom, followed by blue and green grungs, then purple grungs, then red, then orange, and then gold at the top.
Ability Score Increase: Your Dexterity score increases by 2 and your Constitution score increases by 1.
Age: Grungs mature to adulthood in a single year, but have been known to live up to 50 years.
Alignment: Most grungs are lawful, having been raised in a strict caste system. They tend toward evil as well, coming from a culture where social advancement occurs rarely, and most often because another member of your army has died and there is no one else of that caste to fill the vacancy.
Arboreal Alertness: You have proficiency in the Perception skill.
Size: Grungs stand between 2 ½ and 3 ½ feet tall and average about 30 pounds. Your size is Small.
Speed: Your base walking speed is 25 feet, and you have a climbing speed of 25 feet.
Amphibious: You can breathe air and water.
Poison Immunity: You’re immune to poison damage and the poisoned condition.
Poisonous Skin: Any creature that grapples you or otherwise comes into direct contact with your skin must succeed on a DC 12 Constitution saving throw or become poisoned for 1 minute. A poisoned creature no longer in direct contact with you can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. You can also apply this poison to any piercing weapon as part of an attack with that weapon, though when you hit the poison reacts differently. The target must succeed on a DC 12 Constitution saving throw or take 2d4 poison damage.
Standing Leap: Your long jump is up to 25 feet and your high jump is up to 15 feet, with or without a running start.
Water Dependency: If you fail to immerse yourself in water for at least 1 hour during a day, you suffer one level of exhaustion at the end of that day. You can only recover from this exhaustion through magic or by immersing yourself in water for at least 1 hour.
Languages: You can speak, read, and write Grung.
Disclaimer: Outside of a certain surrogate character, this document in no way makes grung a legal, playable race in the D&D Adventurers League, or any other campaign where the Dungeon Master hates amphibians with an excess of apostrophes in their names… and yes if you’re not immune to poison and you must touch the grung to heal it… you get to make a saving throw.