境域行者 (Realmwalker) (zhs)

Creature - Shapeshifter | Power/Toughness: 2 / 3 (CMC 3)
Changeling (This card is every creature type.)
As Realmwalker enters the battlefield, choose a creature type.
You may look at the top card of your library any time.
You may cast creature spells of the chosen type from the top of your library.