When cast, shift grants the caster with the shift effect, which provides a bonus to damage as if their strength score was much higher then it really is.
Shift also adds the same bonus to magic users as technique spell bonus damage.
Shifta however is AOE and will also provide the boost to anyone within its range; this range increases with technique level.
Shift[a] will wear off over time, requiring re-casting. At higher levels, shift[a]'s effect will last longer.
Shift[a] is the direct opposite of jellen and Gelun. A higher level shift[a] will override a lower-level Jellen/Gelun, whereas a lower level shift[a] will be canceled out in the face of a higher-leveled jellen/Gelun.
One of the special effects available to mags is the ability to cast shift and deban on their owners.