The predecessor of the Greedy Demon God was the Immortal Level "Chaos Essence Stone."
Chaos Essence Stone has a characteristic: "Near Zhu, it becomes red; near ink, it becomes black." It absorbs whatever element and becomes the ore of that element.
After nurturing through several epochs, the once Chaos Essence Stone mainly had Earth Fire attributes, and later after joining the Tree of Life, it added a touch of Life Attribute, eventually giving birth to the "Greedy Demon God."
Now, Lu Yuan wants to swallow a large amount of ore, transforming within himself a very small amount of pristine "Chaos Essence Stone"!
He wants the Chaos Essence Stone to be stained with a small amount of "Time Law."
This is truly a bizarre idea, like putting a chick back into the egg, which is really as hard as climbing to heaven!
However, in a world of mind, it's not entirely impossible to achieve.