Hexora, Docent of Compleation

Flash
When Hexora, Docent of Compleation enters the battlefield, exile target instant or sorcery.
At the beginning of your upkeep, you may copy a card exiled with Hexora and cast it without paying its mana cost. If you do, Hexora isn't a creature until end of turn.
"We carved our tales through metal, to transcend and unify your world with ours." - Hexora