The Storm

From HallsWiki

In 2006, a massive storm swept the Halls into a frenzy, tearing up buildings and sometimes people. In the midst of this storm, Revil was killed by the Stranger, who would reveal himself to be the Mirror Slovman.

The event was preceded by a Halls Comic Cover of the event, warning that "Someone Will Die!". This cover won the 2006 award for Best Halls Comic Cover.