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Moreover, this Crystal Core has no usage requirements! When Wang Tao previously merged Fireball and Explosion Crystal Cores, it was stated that only Fire Awakened could merge them, and other Awakeners couldn't use them, which was highly limiting. But these two Crystal Cores pose no such problem—they can be used by anyone who has reached Level 4, lowering the threshold.
However, there are two issues…
One is that, if you want to merge an Ice attribute attack, you'll definitely need to use it in conjunction with an Ice Attribute Enhancement to maximize benefits. But every person can only merge up to four Abilities, and this uses up two spots at once; future Ability mergers would have to be considered more carefully, and changing Abilities would require an Exraction Crystal Core, which is not so easy to obtain.
