This was not a spur-of-the-moment decision by Tai Hao to temporarily form his second dharma form, but rather a plan he devised after much contemplation.
The Innate Eight Trigrams were the foundation when he achieved the status of Daluo Golden Immortal, which he naturally wouldn't abandon. The best method he could think of was to form it into his dharma form.
It was precisely because of this that these eight images, representing different meanings, never disappeared and always existed within Tai Hao's body.
This is what Tai Hao had been preparing for all along.
His initial thought was to disperse the Fuxi Dharma Aspect and reform the Innate Eight Trigrams Dharma Image.
However, he ultimately gave up, since during the time when his foundation wasn't firmly established, the Fuxi Dharma Aspect had also provided him with immense help.
Most importantly, he was reluctant to abandon the Fuxi Dharma Aspect he had formed when facing Emperor Jun of the Demon Clan.
