Mithrax, Kell of Light

Flash
When Mithrax, Kell of Light enters the battlefield, enters the battlefield, create two 1/1 colorless Servitor artifact creature tokens.
Whenever Mithrax deals combat damage to a creature, you may exile target artifact or
enchantment that player controls. For as long as
it remains exiled, you may cast that card,
spending mana as though it were of any color to
cast it.