- Formerly a reward from Operation Arid Fear by earning 50 points or more.
- This mod is now available as a Nightmare Mode reward at the end of the mission.
- One will receive this mod with the Twain Mod Pack when buying at least the 2100 Platinum package on PC and PS4.
- When the mod was originally announced it had a Tactics (Lua 錯誤 於 模組:Icon 中的第 69 行：attempt to index field 'icon' (a nil value)。) polarity. It is unknown if it was changed to a Defense (Lua 錯誤 於 模組:Icon 中的第 69 行：attempt to index field 'icon' (a nil value)。) polarity due to complaints or a bug.
- Similarly to Vitality and Redirection the % increase is based on the base health and shields on the Warframe at rank 0.
- This mod used to share its icon with Fortitude, another Nightmare Mode mod, until it was changed in Update 13.
|Nightmare Mode Mods|
|Warframe||Constitution • Fortitude • Vigor|
|Rifle||Hammer Shot • Wildfire • Shred|
|Shotgun||Accelerated Blast • Blaze|
|Pistol||Ice Storm • Stunning Speed • Lethal Torrent|
|Melee||Focus Energy • Rending Strike|