Preacher [DRK - N/A] Khans of Tarkir Rules Text Contains: You may

Rules Text Contains: You may exile a blue card with converted mana cost X from your hand rather than pay this spell's mana cost

I'll let you choose the blade that slays you

If a source you control would deal damage to a permanent or player

Rules Text Contains: Sea of Clouds enters the battlefield tapped unless you have two or more opponents

Preacher [DRK - N/A] Khans of Tarkir Rules Text Contains: You mayRarity: R Creature Type or Sub Type: Creature Preacher P: 1 T: 1 Rules Text Contains: T: Gain control of one of opponents creatures. Opponent chooses which target creature you control. If Preacher becomes untapped, you lose control of this creature; you may choose not to untap Preacher as normal during your untap phase. You also lose control of the creature if Preacher leaves play or at end of game.