Vileplume

You may sacrifice a creature named Gloom and
pay {g} rather than pay this spells mana cost.
When Vileplume enters the battlefield, put a
-1/-1 counters on each nonartifact creature that
are not both black and green.
Vileplume can't have -1/-1 counters placed on it
First strike, infect
Landfall —Whenever a land enters the battlefield
under your control, proliferate. (Choose any
number of permanents and/or players, then give each
another counter of each kind already there.)