Crush that Body, and Sustain Mine (X-BT02A-SS02/0025EN) (X-BT02A)

[Set] (This card remains on the field.)
When a monster with "Purgatory Knights" in its card name on your field 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 the drop zone, and put the top card of your deck into the 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.