How about a glyph for demon hunters which turns them into a different kind of metamorphosis (doesn’t need to be full on demon) depending on their covenant choice in shadowlands?
Kyrian would turn you angelic, Venthyr would turn you vampiric, Necrolord would turn you more undead and Night Fae would turn you more forest-y or similar.
This wouldn’t impact anything lorewise, it’s just gameplay cosmetics.
turning intoa demon is a demon hunters thing. turning into different kind of demons ? sure. turning into an angel or undead? now that makes little sense
First we need glyphs for Warlocks that let them summon these nice demon models from Legion (there are alot of new demon models).
Then we can talk about new Meta forms for DHs