Befallen Event -- Lanys T`Vyl mobs?

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I recall on my server a time where Befallen was inhabited by dark elves. Was this just a GM Event, or was it a permanent revamp?

http://everquest.allakhazam.com/db/npc.html?id=6694
http://everquest.allakhazam.com/db/npc.html?id=6869
http://everquest.allakhazam.com/db/npc.html?id=6659
http://everquest.allakhazam.com/db/npc.html?id=6695
http://everquest.allakhazam.com/db/npc.html?id=6877
http://everquest.allakhazam.com/db/npc.html?id=6870
http://everquest.allakhazam.com/db/npc.html?id=6868
http://everquest.allakhazam.com/db/npc.html?id=6868

Was this just a GM Event? There are posts on Allakhazam from 2001 (as early as June, 2001) describing weapon drops. Does anyone know when the mobs were put in? I can't find specific patch notes on it.