I like some of the other artifacts:
- I want Xan's line used in the main game!
- The lingering fade of sparklies from those certain spells is actually a very nice touch. Somebody use it, please!
- Surely the music can be fitted in somewhere. Maybe just in BG1?
- Is there's a lightning sword in the base game?? (The sound effect is cheesy, but the visual could work as a weapon effect.)
Agreed on Xan's line and the sparkle spell VFX.
The music didn't sound like it would fit nicely in either game, though; its style is too different from the rest of the soundtrack in my opinion.
I can't recall any lightning swords in BG, but in BGII Celestial Fury certainly qualifies and even the SFX would be lore-appropriate on it. It would be rad to make use of it!
Personally I also really like the color palette on the ogres from the demo.