Just finishing a crawl through, additional image of message shown here:
https://web.archive.org/web/20010826...x/EQ000083.jpg
the event page lists this as a Vox raid on November 18th 2000 (later posts show exploring Velious during release).
Main event page here (should mention it was a PVP server, but don't believe messages were unique there):
https://web.archive.org/web/20011216...80/events.html
So we have a confirmed detrimental spell + beneficial spell wear off message shown from pets.
Anymore proof required? Both sets of photos are at least Kunark era. The one of the necro with the old 'raise a level' text may be vanilla... not sure when that verbiage changed exactly.