I'm not sure I understand what your asking but here is the rule covering what I think your asking. The only weird declination that is not allowed is the denial of a tribe or the name of a tribe that is also a game rule. Examples of both rules: Juggernaut, with its ability not to be able to be blocked by walls, isn’t a Wall card — and neither is Unnatural Selection, which mentions non-wall somewhere. And where Nether Shadow is a viable Shadow tribe card, Soltari Lancer isn’t, as the Shadow word on that card is the name of a game rule. Hope that helped.