Archmagi Priscilla Reindarian

Hexproof, prowess
When Archmagi Priscilla Rienardian enters the battlefield, you may cast an instant or sorcery
spell from your hand or graveyard without
paying its mana cost, once cast, the card is exiled.
{x}{u}{u}, {t}: Copy target instant or sorcery spell
with converted mana cost X.