Mathias - Im not sure if you use this technique in your regular production flow... but even if so i felt it might be beneficial to illustrate this point. Values.

this is your true test of your image being able to 'read'. Off the bat i have to say i love the designs, theyre seriously great, you can immediately recognize whose swords they are

. Claymore's blade's values blend in quite closely with the fire, while it looks cool with color, this illustrates that perhaps some of the value choices arent as best as they could be. the blade quickly flattens and the white outline effect to indicate its sharpness doesnt quite work anymore.
Check the buster stword - i think the balance here is much stronger overall, the hit flattens a good bit, however, as the shadow side's reflective light is the same value as the highlighted side. also the lack of darker formation around the bottom of the hilts handle flattens out the depth even further. (noe the good use of black up near the hilits neck where it attaches to the blade has a better volume read because of the stronger blacks used). Also a bit worrying is the lack of value blending from the whitest 'bursts' of white coming off the blade. It does do a nice job of making it look 'overexposed', but i think just a little bit of softening there in its value transition will make it look smoother, which should aide the read of the energy to the eyes.
moving onto your latest update,

This looks really cool and i like the concept youre going with. Master sword is kindof supposed to be a sword of light, but this makes it look as if ganon had corrupted it, its got a great/cool evil vibe.
Check the values though to help decide how you want to continue rendering it. The blade's edge is getting slightly lost in the energy enveloping it. i think your sword will have a stronger read if the blades edge is darker overall and those whiter values help silhouette the darker edge of the sword. Id like to see the energy's motion that of the dynamism the claymore and buster sword have as well
Notice that your hilt has a very interesting 'molten metal' look to it in the black/white view. i think that has an awesome quality to it, just a bit of cleaning up in its shapes to make it a bit more crisp and consistent will make that area quite stunning.
on a side note, these are rather large pieces... hats off to you
