If I have two or more Christopher Robin – Hunny Sage cards, can I include them in any deck?
No. For Christopher Robin to be included in a deck, it has to match his ink types. Christopher Robin is Amethyst and Sapphire, so he can’t be put into a deck that has any other ink types. Winnie the Pooh & Piglet – Hunny Mages Winnie the Pooh & Piglet – Hunny Mages Amethyst
Official set release notes — Attack of the Vine!