Love this ability! Would like for them to keep it somehow, maybe by calling it Empowered Consecration, or something along those lines! The design would just be a giant consecration that does the same thing Ashen Hallow does with some tuning done. If you make it a baseline Holy ability, it might be wise to nerf it a bit from the current AH iteration.
In terms of looks, have it look like the consecration the first boss in Battle of Dazar’Alor dropped? Kind of like that church-glass windowpane style?
Any other thoughts/suggestions?