Ser Eidret, Fallenfinder

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.

Exile this card and any number of other cards from
your graveyard: Until end of turn, commander
spells you cast cost {x} less to cast, where X is the
number of cards you exile in this way. Activate
only as a sorcery.