Are there other waves?

Some adventurers get to the door and try to force their way in. That knocks you out of your shock, and you let them in.

They rush past you; all 4 of them, including a nearly dead level 82 Paladin. The others were some low levels who managed to survive long enough to help her out. They let you close and shut the door behind them, and that was when you stab the Paladin and a level 7 Cleric from behind while the others were facing away.

Before the others could realize what was happening, he stabbed the other two (levels 11 and 13)

Then there was rumbling.

The monsters were forced to retreat, even the newly boosted ones, and a force of very high levels came on their mounts. You glance and your eyes widen: they are carrying a banner of an old unofficial guild dedicated to power players. They had each reached the point where killing a flight of dragons on their own would not be enough to make them level.

Shit! There was the rumored Knight who was over lvl 2000! It was said he only managed to get that powerful by PVP matches against other guild members!

They head straight to the hut and everything flees before them.