Keen Smell: The rat has advantage on Wisdom (Perception) checks that rely on smell. Pack Tactics: The rat has advantage on an attack roll against a creature if at least one of the rat's allies is within 5 feet of the creature and the ally isn't incapacitated.
Multiattack: The rat makes two bite attacks. Bite: Melee Weapon Attack: +5 to hit, reach 5 ft, one target. Hit: 5 1d4+3 piercing damage.