A purplish hue shift on my original icon:
http://www.hiveworkshop.com/forums/icons-541/btncosmicbolt-163250/
... with some other minor tweaks. Again, done using Pain Shop Pro 8 and Button Manager v1.8.
Please give credit if you use it!
[EDIT] Updated to a higher quality version (85% compression up from 50%, which was Button Manager's default compression value). If you don't like using 11 KB icons then feel free to compress it down yourself.
Keywords:
cosmic, space, bolt, spell, blue, purple, comet