Widespread Annihilation

Rune Gate (If you control Runechants equal to or greater than Widespread Annihilation's {r} cost, you may play it from your banished zone without paying its {r} cost.)
When the combat chain closes, each hero who has lost {g} this turn banishes a card from their hand.
Blood Debt (While this is in your banished zone, at the beginning of your end phase, lose 1{g}.)