Acid Lab

{p/u}{p/g}{p/b}: If you have discarded a card
this turn add {u}{g} or {b}{g} and gain 10 life
activate this ability only once per turn.
{p/u}{p/g}: Draw a card for each
creature you control with a -1/-1 counter on it.
{p/g}{p/b}: Each creature with a
-1/-1 counter on it gets +1/+0
and looses flying until end of turn