Plague, City of 100 Rats

{t}: add {b}{g} to your mana pool, use this only to
cast rat creature spells.
{b}{b}{b}{g}{g}{g}: If you control 9 or more rat
creature spells you win the game.
Many people seem to notice how similar Plague is to
Prague but don't get the wrong idea. This is not where
you want to go for vacation.