In all the giant's records, the event of the Heavenly Kingdom's arrival is depicted as a significant turning point for the giants. It was because of this event that the giant race - an ordinary race - truly transformed into the most highly respected race in the entire multiverse.
Regarding the descent of the Heavenly Kingdom, there are no records in the memories of the Divine Envoys. According to their own memories, even the gods did not know what exactly happened. The giants kept this memory secret in a way that even the gods could not understand. This method must have been devised after the descent of the Heavenly Kingdom.
The arrival of the Heavenly Kingdom triggered unprecedented advancements in the technology of the giants. And due to such advancements, the giants no longer limited their perspective to this universe. They directed their attention towards god, and began to follow in his footsteps.
And creation, was the best way to follow in God's footsteps.
