What happened to him this week? he was free and now it's fiddlesticks?!
He has several known bugs so they removed him for this week.
Who is Karthus? I've never seen him before, unless you're talking about one of those new test realm champs whom you aren't supposed to discuss here.
Edit: You need to check your eyes. I just googled all over for him and no champion with that name has ever existed, much less been present in a free week.
wow really they removed him for bugs even though you can still buy him and play as him? ridiculous. glad i got a win with him while he was free.
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