Jace, Vryn's Prodigy
{1}{U}Legendary Creature — Human Wizard
{T}: Draw a card, then discard a card. If there are five or more cards in your graveyard, exile Jace, then return him to the battlefield transformed under his owner's control.
Jace, Vryn's Prodigy // Jace, Telepath Unbound
Legendary Creature — Human Wizard // Legendary Planeswalker — Jace
Oracle Text
Jace, Telepath Unbound
Legendary Planeswalker — Jace
+1: Up to one target creature gets -2/-0 until your next turn.
−3: You may cast target instant or sorcery card from your graveyard this turn. If that spell would be put into your graveyard, exile it instead.
−9: You get an emblem with "Whenever you cast a spell, target opponent mills five cards."
Watch Out
Cast trigger fires even if counteredWatch Out
This triggers when the spell is cast, before it resolves. Even if the spell is countered, the cast trigger still resolves. Copies of spells are not cast, so they won't trigger this.