WalhallaMOD – World Event

World Event
The World Event is a feature which was integrated to the game from Blizzard and its v1.10 patch. It normally appears only at realms but with a 3tr party tool „PlugY“, you can have this event in your Single Player games.

A „Stone of Jordan“ Counter increases by a randomized timer and if it is high enough, the event begins. You only see this counter in hell games and so the event can only be triggered in this difficulty.
A Superunique monster (the nearest one) transmute into an „Uber Diablo“ and you can fight him. If you have defeated him, you get an unique charm, the „Annihilius“.

But note, that the Uber Diablo is a very strong boss monster and takes long time to defeat him, when alone.