Reapers' Rights

{x} must be equal to the total converted mana cost of your commander or commanders.
If a creature you control would be exiled, put it into your command zone instead. Activate only if there are no creatures in your command zone and only if you control your commander. If your commander would leave the battlefield while another creature is in your command zone, remove your commander from the game.
Non-commander creatures you cast from your command zone cost {x} more to cast, where {x} is equal to th