Mistform Dreamer

Flying
: Mistform Dreamer becomes the creature type of your choice until end of turn.

Doom Cannon

As Doom Cannon enters the battlefield, choose a creature type.
, , Sacrifice a creature of the chosen type: Doom Cannon deals 3 damage to any target.

Canopy Claws

Target creature loses flying until end of turn.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)