Puresteel Angel — Mystery Booster Playtest Cards 2019 #109

Flying, indestructible

When Puresteel Angel enters, exile all artifacts that aren't colorless.

Whenever Puresteel Angel 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."