From Brotato Wiki
Snake
Item
Tier 1
Item
Snake is an in-game item that can be bought from a Shop or can be found in a Crate. Most Items modify the Stats of the player, and some of them provide additional effects.
Effect
Whenever you or one of your Incendiary Turrets inflicts burn to a target, the fire will spread to one extra nearby enemy that isn't on fire and inflict burn to them. Each snake ignites one extra enemy.