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I've noticed the Pentakill band, such as Sona and Mordekaiser in the band. I've thought of this a while back, when I was making a champion. Where Mordekaiser is the Vocalist/Guitarist, Kassadin as a techno/keyboard player, and my personal champion, as a drummer.
I believe that they should make a new Kassadin skin, and which is related to the Pentakill band.