Estrid, the Masked

+2: Untap each enchanted permanent you control.

−1: Create a white Aura enchantment token named Mask attached to another target permanent. The token has enchant permanent and totem armor.

−7: Put the top seven cards of your library into your graveyard. Return all non-Aura enchantment cards from your graveyard to the battlefield, then do the same for Aura cards.

Estrid, the Masked can be your commander.