Fenriss, Kell of Rain

Whenever an artifact leaves your graveyard, Fenriss, Kell of Rain deals damage equal to the artifact's converted mana cost to target opponent.

{b}{r}, Sacrifice an artifact: Create a tapped treasure token

{u}{b}, Sacrifice three artifacts: Target artifact in your graveyard gains escape until end turn, it's escape cost is equal to it's converted mana cost plus exile three other cards from your graveyard.