Cadavros, Prophet of Despair

20: Action: Discard a Clash card with a specific resource cost less than or equal to your resource count. If you do, put target [Discarded symbol] Clash card in your Oblivion with an initial resource cost equal to X into your Clash Zone engaged where X is the specific resource cost of the discarded card.

10: Clash cards you control get, "Trigger - Defeat: If this Clash card and an opposing Clash card were defeated during this clash, your Contender gains one health".