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Swarm of Ash Rats  
Medium swarm of tiny beats , unaligned  

Damage Immunities Fire

Damage Resistances B/P/S

Condition Immunities Charmed, Frightened, Grappled, Paralyzed, Petrified, Prone, Restrained, Stunned

Senses Darkvision 30ft, Passive Perc. 10

Challenge 1/4 (50xp)

Armor Class     13

Hit Points         24 (7d8-7)

Speed              30ft.

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

Swarm The swarm can occupy another creatures space and vice versa, and the swarm can move through any opening large enough for a tiny rat. The swarm cannot regain hit points or gain temporary hit points. 

Flame Feast  The swarm regains hitpoints equal to half of any fire damage it would have received before its immunity. The Swarm must also use its entire movement to move towards and large source of open flame. 

Fiery Fur The swarm ignites any flammable objects that are not worn or carried, located within its space at the beginning of its turn. 

Actions

Bite (greater than half HP) Melee Weapon Attack: +2 to hit, reach 0 ft., one target in the swarms space. Hit: (2d6) piercing damage + (2d4) Fire damage. 

Bite(Less than half HP) Melee Weapon Attack: +2 to hit, reach

0 ft., one target in the swarms space. Hit: (1d6) piercing damage + (1d4) fire damage.