Vir, Wizard of Stahlthrone

Blue instants you cast cost {2} less to cast.
White sorceries you cast cost {2} less to cast.
Whenever you cast an instant or sorcery spell,
you may exile Vir, Wizard of Stahlthrone. If you do, return it to the battlefield under its owner's control at the beginning of the next end step.
"It's all coming back to me now."