Self-Launching Stone

A self-launching stone provides all the benefit of a catapult, without the trouble of constructing or maintaining a machine. On command, a self-launching stone flies into the air and strikes as if fired from a light mangonel, automatically hitting the target square. A self-launching stone only functions once, just like other magic siege weapon ammunition.

Prerequisites: Craft Magic Arms and Armor, telekinesis.

Cost to Create: 250 gp, 20 XP, 1 day.

Source: Heroes of Battle, page 137.