Glow Stalker

Island Walk, Vigilance, First Strike
When Glow Stalker enters the battlefield tap target creature. That creature does not untap until Glow Stalker leaves the battlefield. When that creature untaps, you may pay {1}. If you do, put 2 +1/+1 counters on that creature. If you do not, put 2 -1/-1 counters on that creature.
{t} Return Ghost Stalker to its owners hand.