From Fallen Sword Wiki
Description: Lights up dark realms. More skill points allow more vision on the 'Map' screen. (Vision radius increases every 50 levels)
Duration: 90 Minutes
Potions with this Skill
If you only want to navigate through a dark realm, you not necessarily need Vision (though it's more convenient), you can move within the realm using a WiKi map as well.
But: if you want to kill mobs in a dark realm, use Vision in every case. Because if you lack Vision, your attack will be reduced by 50% prior to each combat!
--Ghafla 09:11, 14 September 2010 (BST)