First Half.

The divine ability of giants of order is not a concept yet but it will do since he has Legion-7 as the substitute for the lacking law of order and the Authority of the Celestial Supreme if need be. 

The first thing he did was to assimilate the Celestial godhood and the crown of a demon king into his slots. The assimilation was easy. His existence warped and shifted slightly to accommodate them. It helped that his divine ability could assimilate anything and that the Celestial that the godhood belongs to is dead and the demon king the crown belongs to is not resisting his assimilation. 

He said to Legion-7, "I feel so heavy." 

"It is probably because you have completed your slots or because you are carrying all the types of authority."

"That's probably true. Now one should have three different types of Authority but I did it."

"That's special and all but you have to hurry up before the Celestial godhood turns you into a god."

"Right."