Sheik, Survivor of the Sheikah

When Sheik enters the battlefield, search your
library for a song card, reveal it and put it into
your hand.
Song spells you cast cost {w}{u}{b}{r}{g} less to cast.
(This effect reduces only the amount of colored
mana you pay.)
"Until the right time, Princess Zelda's consciousness
shall sleep...To awaken as a young Sheikah boy."