Wondering how to hatch a Holly Monster? It's a reasonable question, since getting a Holly Monster is necessary to evolve the Gift Monster. Well you've come to the right place.
Breeding Pair: Ice + Silk or Ice + Tundra
Breeding Time: 14 hours
Availability: Holiday Season
Type: Plant/Ice
Price: 199 Gems (Quite a sum)
Generally any Plant + Ice combination will work - so you can substitute Ice above for Plant and those combinations are just as good.