Help 88 ghosts in her tombs on the cemetry. Azanda need ghostenergy for her witch celebration. Every time a ghost wants to return unprepared to its tomb and meet the frozen ground he lose a part of its ghost energy and Azanda win it for her witch ball.

Grab a gnome with left mouse, hold and put him directly on a ghost.
Use the forest spirit if he smile and klick on it. This will kick the witch Azanda.