Anna took that opportunity to dive between The Shadow and the incoming fire, dialing the Compass to a symbol of an anchor, for hope that the personal symbolism of an Anchor would substitute for techinical knowledge of the symbology of Lyra's world.

Fortunately, it seemed to work, as a shield of pure sanity (http://www.nervarchives.com/images/icon.200x150.sahaqiel2.jpg) sprung into being in front of her, projected by the Compass.

"I hope you have a parachute, because I can't keep this up forever!" Anna snarls.