Each rank in this ability gives rogues an increasing chance to remain hidden when they are an indirect target of an Area-of-Effect spell. At the highest rank, a resisted AoE spell will never break Hide and there is a good chance that the rogue will remain hidden even when a spell successfully hits them. Nerves of Steel does not help when the rogue is the direct target of an AoE spell (if they are the direct target, then they've already been spotted). All ranks beyond rank 5 further increase the chance of remaining sneaking even if you do not resist the AoE spell.
|1||5||66||Omens of War|
|2||5||67||Omens of War|
|7||5||74||Seeds of Destruction|
|8||5||75||Seeds of Destruction|
|9||5||81||House of Thule|
|10||5||83||House of Thule|