Fblthp, the Finder

{w}{u}{b}{r}{g}, {t}: Exile Fblthp, the Finder. Search
your library for a card and put that card into
exile face-down, then shuffle your library. At the
beginning of the next end step, return Fblthp
to the battlefield under its owner's control and
put the other card exiled this way into your hand.
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"I've been lost in so many places, and I've seen so
many things... I've even seen those missing keys that
you've been looking for."