An Exhausting Process!
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RUMBLE!
The Formation activated, making the ground around us tremble rapidly, the giant hands of Rakasha and his enormous hammer smithed through the fusing weapons, as Kate and her mother continued fusing them together.
At the same time, Fuyu and I unleashed our divine powers into the formation itself, strengthening it and keeping it going as it continued to grow stronger rapidly. The four weapons didn't panic, thankfully, and seamlessly combined together.
Their materials rapidly melted into each node, fusing with the marbles meant to evolve their souls. At the same time as they began to merge together, their souls were evolving all at the same time.
Naturally, in normal circumstances, this would mean that every weapon would evolve into their next stage individually, right?
Well, once they started evolving, while fusing, things changed, as they became one, the four evolution processes stacked with one another.