Grim Reaper Karthus Visual Upgrade Preview [5/21 PBE Update]

League of Legends grim reaper karthus visual upgrade preview.
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Grim Reaper Karthus skin got a visual upgrade.

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Majority of content on PBE servers is tentative and subject to change.
The Public Beta Environment, or PBE is a "test-centric" server on which upcoming patches are available for public testing.

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