Ash Rat

Fire Healing. Whenever the rat is subjected to fire damage, it takes no damage and instead regains a number of hit points equal to the fire damage dealt. If it dies, it can be brought back to life as long as it is put into a fire within 1 hour of when it dies.

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

Smoky Hide. Any attack rolls made from outside 10 feet of the rat have disadvantage.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) piercing damage.

Fire Spit. Ranged Weapon Attack: +5 to hit, range 60 ft., one target. Hit: 6 (1d6 + 3) fire damage.