Boskus is a Hybrid monster with the Ice and Fire elements. You can easily breed Boskus using Mammott + Kayna, or can buy it for 120 Gems in the Monsters menu.
When first placing Boskus, you will receive 25 Gold and 50 XP for fullfilling that goal.
Dawn of Fire Description
Lip balm is a fundamental requirement for the rearing of any juvenile Boskus. Finger sucking and nail biting must be monitored heedfully. Caregivers will find themselves led on a merry chase as the nimble-kneed boskus climbs anything and everything.