It only took the Abyss of Chaos less than 1 hour to devour and integrate with the piece of God's Star as was told by Heller. Actually, it was at most 40 minutes. When a dreamlike light curtain like polar light twisted and replaced the original black mist that covered the Abyss of Chaos, the entire process came to an end.
As a result, besides being black, the original Pool of Chaos which was as black as hundreds of millions of years old swamp was also covered with light bands in yellow, blue, cyan and red and swirls in different sizes. Colorful lights were spilling out of the Pool of Chaos while massive elements were surging into the Pool of Chaos like a great river or an ocean. The 4 elements were constantly devoured and converted into the basic energy storage of Castle of Black Iron by the Pool of Chaos.