Lifelink

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.)

Flying

Whenever one or more creature cards are put into graveyards from anywhere, investigate. This ability triggers only once each turn. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")

If Dennick would be put into a graveyard from anywhere, exile it instead.