n small elemental fire 

Perception +9; darkvision, smoke vision

Skills Acrobatics +10, Stealth +10, Survival +9

Str +2 Dex +3 Con +2 Int -4 Wis +2 Cha +0

Smoke Vision The cinder rat ignores the concealed condition from smoke.

AC  18; Fort +9, Ref +12, Will +6

HP 45; Immunities bleed, fire, poison, sleep; Weaknesses cold 5

Fetid Fumes A cloud of smoke surrounds the cinder rat. All creatures within 5 feet, including the cinder rat, gain the concealed condition from this smoke. A creature that comes within 5 feet of the cinder rat or begins its turn within 5 feet must succeed at a DC 22 Fortitude save or take a –1 status penalty to all checks and DCs for 1 round.

Speed 40 feet

Melee [>] jaws +10 (finesse), Damage 1d8 + 4 fire plus 1d4 persistent fire

Beginner Box, page 63.