Stamina is a weapon multiplier that is maximum at 100 % HP and minimum at 0 hp . It first appeared in the nightmare dropped weapon from the Fenrir rerun , Fimbul . This bow has HP up skill and stamina skill , and can be uncapped to 4 and SL 15 . Due to stamina being a completely unique modifier , it is highly desirable since the more modifier you have the better your attack multipliers . The typical varuna bow grid uses 4 bows . They are the core of all varuna builds in recent times . So water varuna players enjoyed a period of time with really powerful grids and massive HP pools due to bow stacking . So when a nerf like this which takes away 40 % of its attack power happens , grids will have to be remade and adjusted again and players will be unhappy .