Puresteel Angel [Mystery Booster: Convention Edition Exclusives]

Flying, indestructible

When CARDNAME enters the battlefield, exile all artifacts that aren’t colorless.

Whenever CARDNAME deals combat damage to a player, you get an emblem with “If you would lose the game, instead your life total becomes 20, shuffle your graveyard into your library, you lose all poison counters, and you lose this emblem.”