Dry Dock

{t}: Add {c}{c}. Spend this mana only to cast a
spell that doesn't share a card type with a spell
already cast this turn.
{t}, Pay life equal to the number of lands you control: Add {u} or {r}. If you control three or
more lands, add {u}{u} or {r}{r} instead; five or
more - {u}{u}{u} or {r}{r}{r}; seven or more -
{u}{u}{u}{u} or {r}{r}{r}{r}.