Sima Yi, Cunning Advisor

Whenever you cast an instant or sorcery spell
you may pay {1} to create a copy of that spell,
if you do, exile the original. Whenever Sima
Yi leaves your battlefield shuffle the exiled cards
into your library.
{2}{w}{u}{b}, Return Sima Yi to its owner's hand.
Sima Yi's owner may activate this ability if
another player controls Sima Yi.