I created the hardest hitting Karthus ult you'll ever see (MAX MAGIC PEN)

I created the hardest hitting Karthus ult you'll ever see (MAX MAGIC PEN)
League of Legends season 13 Karthus Gameplay!  

Check out my website!: https://www.Zwag.gg
Follow my stream!: Twitch: Zwag
Follow my twitter!: Twitter: ZwagLoL
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►@xerath