Special Abilities
Twice per day, a janni can magically change a creature's size. This works just like an enlarge person or reduce person spell (the janni chooses when using the ability), except that the ability can work on the janni. A DC 13 Fortitude save negates the effect. The save DC is Charisma-based. This is the equivalent of a 2nd-level spell. Jann can remain on the Planes of Air, Earth, Fire, or Water for up to 48 hours at a time. Failure to return to the Material Plane before that time expires causes a janni to take 1 point of damage per additional hour spent on the elemental plane, until it dies or returns to the Material Plane.