Overgrowth Equipment

A de-emphasis on creature auras so that mutate doesn't get too oppressive creates a need for equipment for decks that aren't going to be having significant access to mutate or growth mechanics.

But Guthreham under Janell's rule has a massive cultural opposition to artifacts, and they tend to end up destroyed when found.

So I came up with a trio of uncommon artifacts that can be used, but then sacrificed for value if the need arises. Granted, the flavor isn't exactly perfect if the player gets to decide whether to destroy the artifact. But it's sort of a compromise and the set really needs these guys, I think.

Altogether this puts the set at about a dozen artifacts, and that seems about right. In common there's a mana helper and a bunch of simple artifact creatures. Then equipment at uncommon. Then some weird stuff at rare and mythic.