Notes:

http://hydra-media.cursecdn.com/dota2.gamepedia.com/1/12/Nether_Strike.mp3
http://hydra-media.cursecdn.com/dota2.gamepedia.com/8/8e/Spir_ability_charge_07.mp3

Gave a friend about 10 minutes to make this, so it's sloppy :U