+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.