Swarm of Poisonous Snakes

D&D 2024 monster: Swarm of Poisonous Snakes. Source: Monster Manual (2014). challenge rating 2, creature type Beast, Medium size, speed 30 ft., swim 30 ft. The Nature of Swarms The swarms presented here aren't ordinary or benign assemblies of little creatures. They form as a result of some sinister or unwholesome influence. A vampire can summon swarms of bats and rats from the darkest corners of the night, while the very presence of a mummy lord can cause scarab beetles to boil up from the sand-filled depths of its tomb. A hag might have the power to turn swarms of ravens against her enemies, while a yuan-ti abomination might have swarm of poisonous snakes slithering in its wake. Even druids can't charm these swarms, and their aggressiveness is borderline unnatural. Beast Medium 30 ft., swim 30 ft.