Mirkwood

At the beginning of your upkeep each player loses 2 life.
{t}: Add {b} or {g} to your mana pool.
{b}{g}, {t}: Create two 1/3 black, green spider creature tokens. Each player loses 2 life.
At the beginning of each upkeep, if there is
no permanents with power or converted mana
cost 4 or greater, transform Mirkwood.
"Such is the nature of evil; out there in the vast, ignorant of the world it festers and spreads. So it ever was. So it will always be." - Threnduil, Elvenking