Lateera, Concoction brewer

Once per turn, you may exile an instant or
sorcery from your graveyard, then create a potion artifact token with, {2}{b}{t}, sacrifice potion: choose
one -
• Cast target spell exiled with Lateera without paying
its mana cost, then shuffle that spell into your library.
• Look at the top three cards of your library, choose
target instant or sorcery from among them, then you
may have Lateera exile it or put it into your hand.
Put the remaining cards on the bottom of
your deck in