The one who screamed was the Jade Lotus Valley's Valley Master. She instantly wanted to tell Ivy Aries to watch out but couldn't as the spatial formation blocked communication. However, her cry cautioned many people of the Greater Law known as Yin Fusion.
Ice Laws and Yin Laws were both Greater Laws. However, they were both in the lower stratum of Greater Laws. As for Yin Fusion Laws, it was in the higher stratum of Greater Laws. Even Space Laws were said to be in the mid stratum of Greater Laws, so one could see the difficulty of comprehending Yin Fusion with any law, much less Ice Laws.
Sometimes, Yin Fusion Laws were also said to be in the realm of Supreme Laws. After all, Yin Laws could be said to be all-encompassing, intertwining with many seas of laws. As long as one could fuse other laws with Yin Laws, it would allow them to reach greater heights, even more than Yin Fusion with Ice Laws.
The same could be said about Yang Fusion Laws.
