Restless Fortress [Wilds of Eldraine]

Restless Fortress enters the battlefield tapped.

{T}: Add {W} or {B}.

{2}{W}{B}: Restless Fortress becomes a 1/4 white and black Nightmare creature until end of turn. It's still a land.

Whenever Restless Fortress attacks, defending player loses 2 life and you gain 2 life.