A creature that enters the aura or begins its turn there must succeed at a DC 22 Fortitude save or become Sickened 1.
Everything within the aura, including the cinder rat, is Concealed by smoke.
Speed
40 feet
Melee◆ jaws +10 (finesse, unarmed), Damage 1d8+4 fire plus 1d4 persistent fire
Source: Pathfinder Monster Core
Running this fight? Add the cinder rat to the initiative tracker: type its name and the AC, hit points and Perception for initiative fill in, and the book button shows this stat block mid-fight.