Mounting Evidence

Investigate. If you didn't cast this spell from your
hand, instead investigate X times, where X is one
plus the number of cards named Mounting
Evidence in your graveyard. (To investigate, create
a colorless Clue artifact token with "{2}, Sacrifice this artifact: Draw a card.")
Rebound (If you cast this spell from your hand, exile
it as it resolves. At the beginning of your next upkeep,
you may cast this card from exile without paying its
mana cost.)