Usurp the Shadow Throne (IAR110) - Usurp the Shadow Throne Rainbow Foil

Viserai Specialization
If you've usurped this turn, this costs 6[1 - Resource] less to play and you may play it from your banished zone.
When this hits a hero, turn all cards in their banished zone face-down. They lose XLIFE and you gain XLIFE, where X is the number of cards turned face-down this way.
Blood Debt