Champion of Azeroth

When Champion of Azeroth is cast, search
your library for a Background and Class and
put them on to the battlefield.
{w}{u}{b}{r}{g}: Exile one Background and one Class enchantment under your control. Search your
library for a Class and a Background enchantment
and place them onto the battlefield.
Shuffle all exiled enchantments you own back into
your library.