Estrid, the Masked

Card Text

: Untap each enchanted permanent you control.
: Create a white Aura enchantment token named Mask attached to another target permanent. The token has enchant permanent and umbra armor.
: 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.