Just out of curiosity, does the enchantment subtype have any effect on any of these cards? Like, something happens for each [subtype] you control or something? If not, why subtype?
Yep, it will have some interactions, like the Honden-subtype, just not on the cards itself. I'm thinking, for example, about alternate ways of putting them into play/into your hand (think Dark Supplicant). Also, an idea I already talked about is referring to this (Ravnica Sowjet, which will be an artifact putting a 1/1 five-coloured token into play for each [subtype] you control, being one itself.)That's why I need a subtype.