Update:
Okay, so I found out the reason I couldn't locate the lightning emitter... Turns out that "Omen Emitters" are just that; they control the lightning that comes out of your hands during the animation. Sorry about that, it seems the solution was right in front of me the whole time.. 😐
A tad sloppy, but it seems I'm not quite skilled with quaternions yet. (I'm using a calculator online to convert them to and from Euler coordinates)
Thanks Ebmar and Darth Parametric for the info on the lightning texture; I have since made my own version (Which is more or less the same as the one in these screenshots), but it's always good to see what others have been able to do.
The grass will be another issue entirely. I'm hoping there's some master MDL file hiding in the game assets (As it seems the animation had to come from *somewhere*) but it's also possible that the modelers just kept the slices of grassy area and incorporated them into the area MDL (Which would be next to impossible to find), so I'm going to focus on recreating the grass texture as I had previously albeit hopefully a bit cleaner than my first attempts.
I guess in the meantime I will plug away at changing the textures, and if I find more models or anyone has any info on what they're called (Or how the heck to effectively use quaternions), that can be posted here.
Again, thanks so much for the help, folks.