Complex sentence: Ultimately, the two of them would have merged as one to end the conflict; however, the elders called off the ceremony partway through because, as they discover, the Yin and Yang properties are off-balance.
Split into simpler sentences: Ultimately, the two of them would have merged as one to end the conflict. However, the elders called off the ceremony partway through because, as they discover, the Yin and Yang properties are off-balance.