This spell animates a tiny rotary blade drone, taking flight from the caster's fist, which flies toward the target, slashing and tearing with terrible speed, dealing 1d10 points of slashing damage per hit, with an additional +1 damage per two caster levels (maximum +5). The damage is considered magical for purposes of DR, and has a critical range of 18-20/x2. It attacks each round during the caster's turn, using the caster's base attack bonus with an Intelligence modifier bonus, versus the target's AC. Blade drones do not impart a flanking bonus or receive a flanking bonus, and does not benefit from spells, combat actions, or feats held by the caster. If the target moves beyond the range of the spell, the drone returns to the caster. As long as the Blade Drone is active, the caster may redirect it to a different target within range, prior to its attack, by using a move action. The Blade Drone receives a full attack if it does not move during the caster's turn. The Blade Drone may be targeted by spells or mundane attacks; it has an AC of 16 and 10 hp +1 per caster level. It is considered an object and is immune to nonlethal damage and critical hits. It is considered a magic item for purposes of saving throws with all saves being equal to 2 + caster level.