I've looked through *_halo and found coloured halos are missing implications. There's also other kinds of halos which may also need to be implicated, but I'm focusing this BUR on coloured halos.
Black halo has no tags and dark halo seems to be used for it, so an alias is needed to avoid confusion. Separate BUR because it's not an implication and people may disagree.
I think the dark halo wiki needs more clarification if we're going to separate those tags. post #5406021 is probably what the tag is meant for, and post #6136674 is simply a halo that is black. I cannot add black halo to the implications BUR because it had no posts, which I assumed has a reason behind it and was why I made an alias BUR.
After looking at your example, I agree they should be separated, but black halo definitely needs to be populated and dark halo needing more clarification on what the tag is for.
I don't see value in dark halo, its wiki versions do a poor job explaining its use as well. IMO deprecate it and populate black halo with actual black halos, red, purple, blue halo tags and so on instead.
I'm somewhat neutral on this. I can see some value with this tag, as people searching it are probably looking for posts like post #5406021, post #5617003, and post #5603462. I just think it needs to be better defined. I'm also okay with renaming it, splitting it off to spiked halo, dripping halo, etc. tags (I'm not great with names, these are just suggestions), or just use fallen angel for these kinds of halos.
Edit: Forgot to mention this. The halo wiki defines [[dark halo] as "a black/'corrupted' halo". I disagree with filling the tag with just black halos, but 'corrupted halos' is a decent definition.
I've populated dark halo with black halo (plus other tags) and have now added it to the implications BUR. This search has halos which are black and another colour. I don't know what to do about these and don't want to make assumptions, so I've left them alone. Maybe we can create a multicolored halo tag?
