This can be Active or Passive. 1. Active Kill is when the action is taken when instructed by a game effect or as a cost for a card or ability. 1.a. This is referred to as a Kill Instruction. 1.b. When a unit with a Deathknell or other ability that triggers on its own death is to be put in the Trash due to a Kill Instruction, it first has any such ability added to the chain as a Pending Item. Note the unit’s location, attributes, and other relevant information to process those abilities when finalized before completing this Kill Instruction. Example: Draven, Audacious reads in part “When I die in combat, choose an opponent. They gain 1 point.” The ability triggers when Draven himself dies, so it will go on the chain first when a kill instruction is performed on Draven, before he is put in the trash. 2. Passive Kill is when the action is taken as a result of Lethal Damage or as a consequence for any other state.