A weapon would not do him any good. He needed something that could recover and repel at the same time. Mostly, he needed time to formulate how to use his Celestial Qi aggressively as even the Celestials that were born in the 1st layer had no idea how to do it!
They spent most of their time creating a foundation for future Celestial cultivators to progress and deepening the understanding of their own elements.
Unlike where 6 elementals could adapt existing Arts once the underlying relationships were adjusted, the Celestials had to start from scratch!
Metal glowed as if in a furnace before being shaped into a sort of dish. He went with the simplest methods as the weaving was straining around them.
He fused it to a dark metal base with 6 slots. He then quickly engraved sigils around the artifact and used his two professions in sync. Celestial Qi fused with the artifact but the gathering array activated in the base.