Climb keep walls and stealthing-
Stealth until discovered and heavily reduced speed while doing it, like 20%.
A few of u remembers this from “Dark Age of Camelot”. The first real MMORPG I dare say.
A nice touch to the thief along with a new dimension to the game and it was not concidered overpowered by the vast majority. Like u know all class can be tweaked in many different ways and some are weak agains some builds etc.
A friendly suggestion. Dont hate.