Crush that Body, and Sustain Mine (C)

[Set] (This card remains on the field.) When a monster on your field with "Purgatory Knights" in its card name is destroyed by an effect, put the top card of your deck into your gauge. If your life would become 0, put this card into your drop zone, and put the top card of your deck into your drop zone. If that card is a spell, your life becomes 2! You may only Set one "Crush that Body, and Sustain Mine" on your field.