Ben Kenobi, Exiled Wanderer

Ward — discard a card and pay {1}

When Ben Kenobi, Exiled Wanderer enters, exile target creature. Return that creature under its
owner’s control at the beginning of the next end
step.

{x}{w}{u}, {t} Up to {x}target creatures become unblockable this turn. Activate this ability only as a sorcery.