User blog comment:Starfruity/PvZH Class Idea - Cosmic/@comment-28629991-20160806093412/@comment-4009269-20160808054608

The main Tribe is Shadow plants, and the 1/1 plant for it is Dark Moss (yeah, he has an ability, but that's the only way the Shadow synergy would work).

Also, had a good idea for how to have existing classes use the Shadow Tribe and have Synergy; simply give existing cards the Tribe if they fit it, and add a Synergy effect for them. That way all classes can use them without disrupting the card numbers, and not actually affecting any existing gameplay.