Shukfir
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Elements were about attack, Ego was about defense, and they didn't overlap.
Well, technically speaking, there were always both attacking and defensive spells in all schools. It's just that in Elements, there were more of the former, and in Ego, more of the latter.
And now, perhaps, some of the elemental schools will have fewer attacking spells and more defensive ones. For example, Light and Earth in Ashan are more inclined towards positive effects than negative ones.