slow mono white, but stupidly powerful if you can pull it off

Imprint — , : You may exile an instant or sorcery card with mana value X from your hand. At the beginning of your upkeep, you may copy a card exiled with this artifact. If you do, you may cast the copy without paying its mana cost.

Return target creature card from your graveyard to the battlefield.

Destroy all creatures. They can't be regenerated.

Destroy all lands.