Shattered mind

Enchant creature
Enchanted creature gains "{4}: Reveal cards from
the top of your library until you reveal a creature
card, exile that creature card and then shuffle
your library" and "{u}: Exile this creature, then
play a different creature exiled with this card for
no cost, attach this enchantment to that creature
instead of putting it into your graveyard. You
may only use this ability once per turn."