"Matthew Mitchell" (4)
Target creature loses flying until end of turn.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)
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.
Flying
: Mistform Dreamer becomes the creature type of your choice until end of turn.
Gatherer works better in the Companion app!
, 
, Sacrifice a creature of the chosen type: Doom Cannon deals 3 damage to any target.