From a private message on wowace:

Can you add detection for Divine Star? Spell ID 122121

I don't even know how this Priest talent works.

It's like a Holy boomerang. I'm not sure how displaying it would be helpful. I have a Priest, I'll look at it I guess.

There's no buff or aura associated with this spell. It does damage/healing that's all. It's doesn't even require a target. It falls under this category of spells. https://github.com/Adirelle/AdiButtonAuras/issues/62

And its cooldown is short enough to not matter.