"The first condition is that you cannot participate in the upcoming battle. The second condition is to hand over all your weapons and storage equipment."
The Sea Emperor quickly stated his terms.
The reason he didn't want Haisas to join the upcoming battle was simple: an assassin is often extremely lethal in a chaotic battlefield.
Once battle commences, Haisas's advantage would be enormously amplified. Even though Becca could completely restrain him now, in a chaotic fight, Becca would surely be distracted and unable to effectively harm Haisas. Additionally, due to other energy wave interferences, Haisas's movements would become even more unpredictable.
Most importantly, apart from Guding and a few main combat power members of the Guding Pirate Group, the rest could suffer significant injuries or even death if Haisas attempted an assassination during the chaos.