So, basically it just keeps killing the minions that the Shethno and the dragon spawns, not hitting the dragon its self (killing i won't let it spawn any minions that you can kill for xp/fame)
There were quite a lot of multi boxers doing this exploit in the mid lands with the minions that drop snake pits, and some one called it out so DECA made the 3rd wave of minion re-spawn not give you xp/fame.
Wrapping it up, its just a text document that tells you what boss/mob that spawns minions that keep giving you xp after killed even after the 2nd wave.