Green is the binary... which model are you using?!
The link in the duplicate Giovanni leads to the Vampire Lords creature (high-poly model, not LOD).
Here, too, the file is duplicated and modified inside.
The original material for the souls crawling on the sword references the default texture; my material references a texture with a changed color (Purple).
The xdb textures look like this (original on the left, my modified one on the right).

Here are the dds files themselves.

The Idle animation has also been modified.
The effect has been changed here.
Next, there will be some more strange things that don't relate to the souls crawling on the sword, but do relate to the greenish haze coming from the sword (I haven't been able to fix it either). The thing is that in the original vampire sword file, there are references to textures of RED fire (I checked the files, they are indeed red), and there are also references to textures of RED flashes.

But in the game, all of this is green. I added my own Idle.

In which there are already links to my recolored textures. This is what the original looks like (red on the right) and my version (purple) on the left.
And the flashes (yes, the original is somehow without alpha, but it looks good in the game, and I haven't polished mine yet).
In conclusion, my current conclusion is:
There are probably 3 textures for the model with the crawling souls. But in the files, I only found 2, and both of them reference the same image (which I recolored).
The effect of the original model, according to the contents of the xdb, should be a red effect, but nevertheless, it is somehow green (it feels like somewhere in the intermediate stage, some mechanism is applied that changes the color, like the Hue/Saturation in Photoshop).
In the game, we see the following:
The sword is purple.
The strip of souls is green.
The strip of souls is purple.
The flashes going upwards are dark purple.
The glow from the fire textures is green.
In short, it's neither fish nor fowl -_- I'll be glad for any comments; I really don't know what else I can do; I've tried everything.