Puresteel Angel [Mystery Booster Playtest Cards]

Flying, indestructible
When Puresteel Angel enters the battlefield, 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."