Mul Daya, the Underloam

{2}, {t}: Add X in any combination of either {b} or {g}, where X is the number of Elves you
control.
Lands you control have "{t}: Add {b} or {g}.
Activate only if you control no creatures or if you control an Elf."
{b/g}{b/g}, {t}: Until end of turn, Elves you control
have "{t}: Add {b} or {g}."