Estrid, the Masked [Commander 2018]

+2: Untap each enchanted permanent you control.
−1: Create a white Aura enchantment token named Mask attached to another permanent target. The token has permanent enchantment and totem armor.
−7: Mill seven cards. 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.