Frostfall Keep

This land enters tapped unless you own a Plains and a Mountain or a Forest.
{t}: Add {g} or {w}.
{3},{t} and tap an untapped Town you control: Frostfall Keep becomes a 4/4 Artifact Creature — Wall with Defender until the start of your next turn.

The Thane and the Town Council expanded the Town of Heljarchen, including more homes, farms, and a keep surrounded by defensive walls.