Sejiph of the Stars

Whenever one or more creature cards are put
into your graveyard, if they were not put there
from the battlefield, you may exile one.
If you do: Create X 1/1 blue Illusion creature
tokens with flying, where X is the number of creatures you own in exile.
Sacrifice an Illusion: Shuffle target card in a graveyard into its owners library. If the
chosen card was not owned by you, Surveil 2.