Rotigus The Generous One.

Infect.
All Plaguebearers gain +1/+1.
{g}{g}: Summon 2 1/1 Nurgling counters with Infect.
{g}{g}{g}: Give all of your opponent's creatures -1/-1.
{g}{g}{g}{g}{g}: A target creature loses -3/-3, and you gain 3 life.