Disc priest has an awesome talent called Shadow Covenant that turns a few main Holy spells into Shadow spells when you summon your Shadowfiend/Mindbender/Voidwraith. That is super cool, but unfortunately doesn’t have a visual effect at all despite being a pretty powerful talent with a pretty decent duration (12-15s+).
Really would like a glyph for it or maybe just a default visual for it that gives the Disc priest some sort of shadow aura/effect for the duration of Shadow Covenant.
edit- It does actually have a visual, not sure how I missed it lol. You get the trailing shadow effect from spriest shadowform with a slight shadow visual on the character.