Gas Field

Gabby (unfortunately, or not. Depending on who you ask) died of poisoning. No one really knows how but it happened. And now as a ghost traveling around she's starting to realize that she has a lot of wind like powers. 

Including flying, floating, turning invisible or visible, and also Poison Gas. 

Gabby loves her poison gasses with her whole heart. (She still has it, she's checked.) It can do a multiple of things depending on what she's attacking. It can kill small animals like rabbits and squirrels pretty easily but things the size of humans normally just feel a really bad headache. OR! Pass out and get sick.