Zhang Chen was taken aback by the words, never expecting such twists and turns, but upon reflection, it made sense. The power of the Heaven-Opening Fire Spirit is so defiant that subduing it would be extremely difficult.
Unless it's bound before it transforms, attempting to subdue such a Heaven-Opening Fire Spirit might require the resurrection of the Pangu Saint.
However, at this moment, a doubt arose in Zhang Chen's mind. The birth of The Queen Mother of the West was far too early; she must have emerged before the Heaven-Opening Fire Spirit's era to have time to cultivate and refine the chains that could trap the Fire Spirit.
The Queen Mother of the West must have transformed long before the Heaven-Opening Fire Spirit, when the Fire Spirit had not yet developed intelligence or transformed, otherwise, how could the Fire Spirit be easily captured?
