Gekko Moriah

When Gekko Moriah enters the battlefield, exile another target creature or artifact until Gekko
Moriah leaves the battlefield. You may cast that
card for as long as it remains exiled, and you may
spend mana as though it were mana of any type
to cast that spell.
"Live the life you have! In this world, your role is to
be crushed!" "All your shadows will serve me!"