Jailux-en, Void Runner

Shadow
As long as Jailux-En is your Commander, whenever a card you own would leave your library, exile it instead. You may play cards from exile as long as you pay {2} more to cast them if they are nonlands.
You may cast Jailux-En from the command zone without paying his mana cost, if you do, you lose 4 life and an additional four life for each time you've cast it from the command zone.