Jace, Vryn's Prodigy
{1}{U}
Legendary Creature -- Human Wizard
0/2
{T}: Draw a card, then discard a card. If there are five or more cards in your graveyard, exile ~this~, then return him to the battlefield transformed under his owner's control.
Kytheon, Hero of Akros
{W}
Legendary Creature -- Human Soldier
2/1
At end of combat, if ~this~ and at least two other creatures attacked this combat, exile ~this~, then return him to the battlefield transformed under his owner's control.
{2}{W}: ~this~ gains indestructible until end of turn.
Nicol Bolas, the Ravager
{1}{U}{B}{R}
Legendary Creature -- Elder Dragon
4/4
Flying
When ~this~ enters, each opponent discards a card.
{4}{U}{B}{R}: Exile ~this~, then return him to the battlefield transformed under his owner's control. Activate only as a sorcery.