Giant Plague Rat

Traits

Keen Smell. The rat has advantage on Wisdom (Perception) checks that rely on smell.

Evasion. If the rat is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, the rat instead takes no damage if it succeeds on the saving throw, and only half damage if it fails.

Actions

Bite. The Giant Rat attacks with its Bite.