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I think I've ALMOST made a decision. I am mostly thorn between Crafting and Mana Disruption. So let's lay the pros and cons of these two possible evolution forms first.
With Mana Disruption, I would most likely upgrade its original form and make it even more lethal. I remember that hyper charging this energy into the tips of my fingers and releasing it damaged even Tier 10 beings such as Arachne with ease.
If I evolve it with this Divine Skill Scroll, its lightning powers might elevate even further, and it could cancel or disrupt the flow of Mana to an even greater extent, making it an even better tool to use against mighty foes.
And then there's Crafting. I think it might either help me craft things out of pure divine lightning or imbue items and objects with divine lightning for powerful new effects, or both, or something completely different.