Ashe, Frost Sniper

At the beginning of your upkeep tap up to one untapped creature an opponent controls and put
two stun counters on it.
{s}{s}, Tap up to one untapped creature an
opponent controls and put a stun counter on it.
{s}, Put a stun counter on target creature an
opponent controls that is tapped and has no stun counters on it. Activate this ability only
as a sorcery.