Ghulmarsh Wetlands

When Ghulmarsh Wetlands enters the battlefield, sacrifice a swamp or island or sacrifice Ghulmarsh Wetlands.
{t}: Add {u} or {b}.
{t}, sacrifice an island, pay 2 life:
Add {u}{u}{u}{u}.
{t}, sacrifice a swamp, pay 2 life:
Add {b}{b}{b}{b}.