When one or more Units is killed due to a Cleanup, that kill action is attributed to the spell or ability that resolved immediately prior to that Cleanup that dealt damage to the Unit or Units. 1. The player responsible for the deal action is responsible for the kill action. 2. If the Cleanup that caused the units to be killed was the Combat Cleanup, the sources of the Combat Damage are attributed the kill action, and their controller is responsible for the kill action.
