msem-instigator

Whenever Grin, Scourge of Goresand attacks, when you cast your next instant or sorcery spell this turn with mana value 3 or less, copy that spell. You may choose new targets for the copy.
Dash {2}{R} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)