[@Evil Snowman]
Combat Mode can only be fired on one target at a time, following usual attacking rules. Alternatively, the weapon can be instead fired in Marker Mode, where it can be fired on one target while dashing (the action doesn't count as an attack), two targets while making an attack move, three when moving one square, and four when standing still. Note that the targets must be in eligible range of Caretaker when the markers are fired. The effect of the marker lasts for 5 turns including the turn it was used.