He Who Walks Unseen

Protection from other spells and/or abilities.

Creatures blocking or blocked by He Who Walks Unseen phase out until He Who Walks Unseen leaves the battlefield.

He Who Walks Unseen’s power and toughness are equal to the number of cards in exile and phased out.

Alter Ego (You can have two commanders as long as both have Alter Ego and share a creature type)