Hastriael, Patron of the Abyss

Flash, Menace, Ward - {u} or Pay 2 Life.
Spells you cast during your opponent's turn cost {1} less to cast.
Whenever you cast an instant or sorcery spell for
the first time each turn, create a tapped 8/8 blue kraken illusion creature token with "Sacrifice this
creature if it becomes the target of a spell or
ability."