'Only the foolish stand and observe while a tree falls on them.' This was an idiom passed down to the Gutu population for many generations. Its meaning was simple. One must act quickly before a disaster occurs. Nhamo was in a similar situation. His disaster was in the form of a child.
By the second, Taku's aura got stronger, indicating that he was getting used to his new power.
"I can't let this go on!"
Nhamo decided to act before Taku gained control of himself. As a veteran, he would have acted sooner, but the Tyrant's Oppression of Taku emitted disturbed his mind. He had royal blood within him, thus he had a little bit of resistance. The others, however, had none. They could only rely on their strong will, which would take time.