Thread:Gen. Grievous1138/@comment-26444332-20160120052937/@comment-26172435-20160120064035

- facepalms -

Google for that in combination with Minecraft, this wikia and Tales of Ages.

With the server down, you can delete region files that hold corrupted chunks / builds and let the regions automatically regenerate after restart.

Better return to a saved backup while you can, to save all the builds ... and use the regiin regeneration strategy for the grief affected areas.

Identified the griefers with CoreProtect?