415.1.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. 415.1.a.1.a. This is referred to as a Kill Instruction. 415.1.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 .

415.1.a.2. Passive Kill is when the action is taken as a result of Lethal Damage or as a consequence for any other state.