The Inextinguishable Wanderer

Whenever The Inextinguishable Wanderer deals damage to a player that player shuffles their graveyard and exile into their library then exiles that many cards from the top of their library, you may cast any cards exiled this way without paying their mana costs

The Inextinguishable Wanderer cannot be exiled
Deathtouch, Hexproof, Indestructible, Lifelink, Trample

This card counts as your commander
There can only be one Mythical card in play at a time