I got the Ring of Invisibility from that lich in City Gates, but it seems it doesn't work. When I put it on, nothing happens and all enemies still can see me. Is it a bug?
The ring allows you to turn invisible once per day. It doesn't turn you invisible all the time.
SWC
Sir Edmund:"Should you obey the lord who asks you to put a village of innocents to the torch? Is that chivalrous? Is it noble?" Me:"It's a great way to get promoted, I know that much."
Thank you, I see it now. The item description was apparently wrong (it says its user becomes invisible until first attack, and to become invisible again you have to wear in off and on again).