Transferred Mantle

When Transferred Mantle enters the battlefield, search your library for a Legendary Creature spell with eminence and add it to
your hand. Shuffle your library.
If your commander leaves the command zone, you may put a Legendary Creature with Eminence from your hand into the command zone.
If your commander is sent back to the
command zone, exile this card and the
Legendary Creature with eminence.