When Zi Dan was given the order by Xiong Da to disperse, he was all the more than happy to do so. The horror he experienced upon seeing the lady dressed in Victorian garb, was amplified by the memory of his first encounter in this particular raid.
The feeling of sheer trepidation from the Final Boss was similar to the six legged Valg's paralysing stare, except that this time around, it was very much courting death.
Hence, Zi Dan rather performed this menial job and let the brave Pandawans do the bulk of boss fighting while he attempts to find this Item of Power those Black Masked Cultivators talked about.
"Hahaha! So much for conserving energy for the Last Boss!" Xia Mao said to Zi Dan with bated breath as he tried to catch up with Zi Dan's running pace. "More like conserving the last bit of stamina to run away from the boss fight!"