Crashing Drawbridge

Defender
{t}: Creatures you control gain haste until end
of turn.
Riverrun is the seat of House Tully. In times of
danger, sluice gates can be opened to flood a channel
cut to the west of the castle, turning Riverrun into an
island. Its walls rise sheer from the waters and its
towers command the opposite shores, making
assaulting it almost impossible.