Rancid Degeneration. At the end of each of the troll's turns, each creature within 5 feet of it takes 11 (2d10) necrotic damage, unless the troll has taken acid or fire damage since the end of its last turn.
Multiattack. The troll makes one Bite attack and two Claw attacks.
Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit:9 (1d10 + 4) piercing damage plus 16 (3d10) necrotic damage.
Claws. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit:11 (2d6 + 4) slashing damage plus 7 (2d6) necrotic damage.
Trolls that are nearly obliterated but survive and regenerate from mere scraps of flesh can display bizarre features. Radically transformed trolls like the rot trolls, spirit trolls, and venom trolls that follow are especially likely to arise when trolls regenerate in the presence of magical emanations, planar energy, disease, or death on a vast scale, or if their bodies were damaged by elemental forces. These unusual forms can also be produced and shaped by the ritual magic of evil…