This spell creates 1d4 small clockwork constructs from an elaborate music box that immediately attack the nearest enemy within the spell's range. The box may be held by the caster or deposited on the ground. They remorselessly attack this foe until the opponent is killed or destroyed, upon which they attack the nearest opponent. At each subsequent round, the box produces an additional construct, which attacks the nearest opponent. If there is no opponent within range, the constructs will wait until one appears. After the spell ends, they become a pile of mechanical junk.

The constructs are Small, with an AC 10, 10 hp + 1/caster level, saving throws of 2 + caster level, and a speed of 20 ft. They each have a single slam attack made at the caster's base attack bonus + Intelligence modifier for 1d4+2 points of damage that is treated as adamantine for purposes of overcoming DR.

The music box has a hardness of 5, 10 hp, and a break DC of 15.