Soul Bend

Turn target nonland permanent face down,
it becomes a 2/2 colorless morph creature.
It's controller can't flip it face up again.
The world's were never meant to be fused.
Tarkir's very soul is unstable. Your ancient
Jeskai learned the soul bending prowess created
by myself. We must unlock this knowledge. Send
the dragons home. And split Tarkir again.
—Ugin, the spirit dragon