428.1.a. This can be Active or Passive. 428.1.a.1. Active Kill is when the action is taken when instructed by a game effect or as a cost for a card or ability. 428.1.a.1.a. This is referred to as a Kill Instruction. 428.1.a.1.b. When a unit with a Deathknell is to be put in the Trash due to a Kill Instruction, it first has its Deathknell added to the chain as a Pending Item. Note the unit’s location, attributes, and other relevant information to process its Deathknell when finalized before completing this Kill Instruction. 428.1.a.2. Passive Kill is when the action is taken as a result of Lethal Damage or as a consequence for any other state.