Hellbeard's Hammer.

A hammer that roars to life with living flames, once the possession of a mad fire dwarf. STR vs. AC; -2 to attack rolls if STR mod is less than 2. Does 1d10+2 dmg, and catches the target on fire for 4 points of fire dmg per round (save ends). On a failed attack roll, the bearer catches on fire for 2d10+2 dmg, plus 4 points of fire dmg per round (save ends).