Forest Vipera

Forest Vipera enters the battlefield with X +1/+1 counters on it.

Forest Vipera can’t be the target of instant spells.

Whenever Forest Vipera enters the battlefield or is put into your graveyard from anywhere, put a -1/-1 counter on target creature an opponent controls.

{x}: Remove X +1/+1 counters from Forest Vipera. Put a -1/-1 counter on up to X target creatures. Activate only as a sorcery.