Sanctum of Brilliance

Sanctum of Brilliance enters the battlefield
tapped.
{t}: Add {w}, {u}, or {b}.
{3}{u}{w/b}{w/b}: Until end of turn, Sanctum of
Brilliance becomes a 3/6 white, blue, and black Leviathan creature with "When this creature
deals combat damage to a player, untap all
artifacts you control." It's still an artifact land.