Circle of Vivienna

This is a Booster upgrade that affects all mage monkeys.

Description
Monkey magi have learned the legendary Circle of Vivienna, a defensive spell that provides all mage monkeys with a Level I Shield!

Stats

 * Provides a Level I Shield to all mage monkeys (Monkey Apprentice, Time Leaper, Black Void Shooter, Ice Tower, etc)
 * costs 1500 Monkey Money or 10 NKCoins