Low Gravity Field(LGF hereafter) is advanced skill of Zoya.
It can :

• Slow down speed of objects and characters.
  
• Increase jump height of Amadeus, Zoya and Pontius.
  
• Block water and poison.
  
  • These can't break into LGF. If you're in LGF, They'll never touch you.
    
  • Water and poison can flow along by border of LGF.
    https://www.youtube.com/watch?v=lDzmhO1KunQ
• Decrease strength of wind and fire.
  https://www.youtube.com/watch?v=7ozKuIi8Feg
  • Some fire(from enemies) can be blocked
    https://www.youtube.com/watch?v=yZRbFBauPS4
• Reflect light beams.
  https://www.youtube.com/watch?v=qiBoArJxZo0
• Float conjured object.
  
  • The law of inertia still affects objects in LGF.

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Especially it is useful when you play a game on hard using hardcore mode.
If a large number of enemies appear, stay corner and use this skill.
Spread explosive arrows in LGF. Everything slows down in LGF.
Enemies will never touch you. It's like shield of arrows.
See these examples below :

https://www.youtube.com/watch?v=Wo90AzGF0wohttps://www.youtube.com/watch?v=O0FrJgsiyDEhttps://www.youtube.com/watch?v=UFd4EL9Oa5Y

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Float Amadeus's conjured objects and jump on it.
Take care inertia. Grab the object and hold it for second to make it stabilize.
You can rotate the object by using 'a' and 'd' key.
If you get used to it, you can go everywhere.
See these examples below :

https://www.youtube.com/watch?v=MXirHLSWBGchttps://www.youtube.com/watch?v=mms74MdEJuc