Ser Eidret, Demonfinder

When Ser Eidret enters play, you may reveal cards from
the top of your library until you reveal an Aura or
Equipment card. Put that card into your hand, and the
rest on the bottom of your library in random order.

If Ser Eidret is in your graveyard, you may exile it and
any number of Aura or Equipment cards in your
graveyard. If you do, until end of turn, commander
spells you cast cost {x} less to cast, where X is the number
of cards you exile this way. Activate only as a sorcery.