Magic Resistance. The pixie has advantage on saving throws against spells and other magical effects.

Innate Spellcasting. The pixie’s innate spellcasting ability is Charisma (spell save DC 12). It can innately cast the following spells, requiring only its pixie dust as a component:

At will: druidcraft

1/day each: confusion, dancing lights, detect evil and good, detect thoughts, dispel magic, entangle, fly, phantasmal force, polymorph, sleep

Superior Invisibility. The pixie magically turns invisible until its concentration ends (as if concentrating on a spell). Any equipment the pixie wears or carries is invisible with it.

Multiattack. Zarina has a rapier that she can use to attack twice with. +7 to hit. 5ft Reach. 1d6+7 piercing damage. 

Alchemical Dust. Zarina has perfected her manipulation over pixie dust creating this mixture that switches a character’s class with another character. Zarina throws this pixie dust out to her target. +7 to hit. She can target 4 people at once. If the creature is hit the player must roll 1d6 and switch classes with the corresponding player. This effect will end once players leave the book. 

As a bonus action she can strike once with her rapier.