Constrictor Sage (TDM-039) - Tarkir: Dragonstorm

When this creature enters, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Renew — 2U, Exile this card from your graveyard: Tap target creature an opponent controls and put a stun counter on it.
Activate only as a sorcery.