Cabin of the Tidecrasher

{t}: Add {c}.
{t}: Add {u}, {r}, or {g}. Activate this ability only if you control five or more lands.
Whenever you cast a noncreature spell with a converted mana cost of three or more, untap Cabin of the Tidecrasher.
Captain Rehannicus Mossbeard prefer to be isolated as much as possible.