Stealth Ring makes you invisible for 10 minutes. This item is of course great for hunting creatures that are not immune to invisibility (Such as: Hunters, Fire Devils, Demon Skeletons and Orc Berserkers). And for sneaking into places with large amounts of monsters that are not immune to invisibility, such as Medusa Shield Quest. On Hardcore PvP worlds the spell Cancel Invisibility has a chance to destroy worn stealth rings. Be mindful of the time left on your ring, as your invisibility might run out while you are in midst of a swarm of monsters.