Cards in graveyards can't be the targets of spells or abilities.
Disturb (You may cast this card from your graveyard transformed for its disturb cost.)
Whenever one or more creature cards are put into graveyards from anywhere, investigate. (Create a colorless Clue artifact token with ", Sacrifice this artifact: Draw a card.")
If Dennick, Pious Apparition would be put into a graveyard from anywhere, exile it instead.