There are a million ways to build a drone to kill something that would not destroy the drone. - String a wire between two drones - Stick a spear to the front

There are a million ways to build a drone to kill something that would not destroy the drone. - String a wire between two drones - Stick a spear to the front - Have it drop acid - Have it lift then drop the monster - Have it lift and drop a stone on the monster - Build in crossbow/ballistae etc etc....