Poison Grenade

Poison Grenade comes into play tapped.
{t}, Sacrifice Poison Grenade: For each poison
counter on target opponent, put another
poison counter on that opponent.
{t}, Sacrifice Poison Grenade: For each -1/-1
counter on creatures opponents control, put
another -1/-1 counter on that creature.
"Not everything that doesn't kill you makes you
stronger."