Ugi, Druid of Rot

{t}{x} Put X infect counters on target creature
All creatures with Infect counters on them get -1/-1
Ugi, Druid Of Rot gets +X/+X were X is the number of creatures with infect counters on them
Ugi's, DRuid Of Rot's Power and Toughness is equal to the number of green and black creatures on the battlefield