Shadow Mend is a heal that DOES DAMAGE. That to me makes no sense. Albeit, the damage is variable, just make it a straight heal minus the average damage it does. Imagine someone dying from a heal you do, lol. It may seem impossible, but say they don’t pop a heal pot or something because you heal them and then the damage (albeit small) kills them, or leaves them vulnerable to dying.
Not to be overly dramatic, but it I hated spamming Shadow Mend in Shadowland dungeons. It just bugged me because versus a Holy Priest spell that adds a HOT (Echo of Light) a heal that adds a DOT seems dangerous. How can you have confidence in it? Just me, but it seems off that a healing spell should do damage.
Also consider the math. Flash Heal does about 9k healing. Shadow Mend does 12k, but then can do 6k worth of damage. So which is better? Under some circumstances it can do less total healing than Flash Heal (the initial 12k minus the damage–up to 6k, that is), AND the damage can nearly kill your target if they are near death and take (and don’t take) a certain amount of damage from other sources immediately after the 6k damage that Shadow Mend does.
The explanation says that the damage follows the healing. So you intially do 12k healing. And then the spell does up to 6k damage assuming there are no other sources of damage. But say you heal them up from near death to 12k. Then they dodge damage or mitigate it. And then Shadow Mend does 6k damage to them. But then just as the damage from Shadow Mend stops, they take a 6.1k hit of damage. That WILL kill them.
So when you are the healer, the healing you think you are doing can be somewhat deceptive.
Yeah. That is a pain. I just see it as a nuisance because A. You don’t know how much healing it is ultimately going to do. B. It can potentially leave your tank vulnerable in hard content. C. You ought to track it.
In Shadowlands, I always looked at stuff like damage taken after finishing a key. And honestly, I was often shocked at how much damage Shadowmend was actually doing. It wasn’t always at all insignificant.
And ultimately, if you are a keyholder looking for a healer, do you really want a healer whose spells damage the tank?