C88 Advanced Mental Strengthening

"First up, let's boost the Tyrant's spirit. I wonder what the advanced strengthening will be like... I can hardly wait."

He accessed the Tyrant's Strengthening interface.

He was set on maxing out the Tyrant's spirit. With just the intermediate strengthening, the Kenbunshoku Haki had already manifested. He could only imagine the might of the advanced level