Actually, it’s after the very first mutilation took place he fought top
Astounding Endurance: To the best exception to this rule regarding a rise in perspiration, Netero failed to seem to be impacted by the loss of a couple branches. His arm being cut a moment shortly after his base didn’t end him out of unleashing his greatest attack or to talk to Meruem.

Muscles Handle: Netero can possibly prevent loss of blood off a severed feet by contracting the muscles in the injury. […]