Originally posted by Complaintdesk:

"The Horde is Attacking" Includes 2 very large stone-axe wielding berserkers, who hit like Andre the Giant using Lucille. There are also 2 shaman casters who cast protective bubbles on themselves and others, and have 2 powerful spells, an AoE & fireballs, and 20-30 fulings, wielding a variety of weapons, so it is an Invasion Event or Raid.

Which is why the OP makes no sense what so ever to me. It's either he is not on a solo server, or this is the 1st major bug we have seen, and I am leaning towards the first scenario because no one has experienced anything remotely like a Horde invasion after killing Elder.