The Forest of Ice was divided into rings of danger. There was the outer ring, which mostly had Gold Mancy Ice Spirit Beasts, and then the inner ring, where Cloud Mancy Ice Spirit Beasts became more common, while Gold Mancy Ice Spirit Beasts moved in large swarms and one could be easily overwhelmed if they were careless.
It was already highly disincentivized to enter the inner ring unless you were extremely confident in your strength. The swarms of Ice Spirit Beasts were too many, and it was even said that the Ice Mana was so potent that Spirit Beasts often manifested spontaneously in random locations.
This Ice Mana concentration was the true danger, though. If before someone quite powerful could get away with deploying their Third Eye, in the inner ring, you would likely be frozen instantly.
