Deathly Wail (Blue) (DTD148) - Dusk till Dawn

Rune Gate (If you control Runechants equal to or greater than Deathly Wail's [1 Resource] cost, you may play it from your banished zone without paying its [1 Resource] cost.)
When the combat chain closes, create Runechant tokens equal to the number of heroes who have lost [Life] this turn.
Blood Debt (While this is in your banished zone, at the beginning of your end phase, lose 1 [Life].)