Luminar

don't know why i can't log in to the original website to make a thread on insane difficullty but i wanted to know if anyone has played this? i beat Garai recently but it was really annoying and i had to get abit lucky. but when i saw a video of the fight on youtube i noticed this guy had 3-4 mag negates.... i only have one i got from starky himself, where do you find more? what drops them?