Red Sun
Superman, astrong opponet, but not unstoppable, while being one of the Justice League's heavy hitters, reveling his weakness to kyptonite will be defficult, a peice of kyptonite, given to me by Superman himself, is located in volet 7B.
There are sevral types of kyptonite, only a few able to harm the Man of Steel, green weakess, red causes unprotectable effects, and gold removes a kyptians powers, all 3 have the power to kill a native of Kypton
I have created kyptonite amer and weapons to help aid in battle if Superman ever goes rouge.