Hide the Evidence

You may put target creature card from your graveyard on the bottom of its owner's library or
you may put target nonland permanent on the
bottom of its owner's library.
Cipher (Then you may exile this spell card encoded
on a creature you control. Whenever that creature
deals combat damage to a player, its controller may
cast a copy of this card without paying its mana cost.)
Dimir has eyes, ears, and hands everywhere.