Boris K
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Arjien, with Chaos spells and in their native castles, there shouldn't be any problems, just as with Light magic. IMHO, one school of magic is enough for an Elf. And I prefer leadership over spellcasting. I don't remember how it was in the 1.x versions, but in 3.x, you can upgrade Empathy – the hero moves much more often than with spellcasting. God forbid you encounter a Faidaen of level 30+ with Chaos and Empathy. I had one like that by the 5th mission in version 3.0. Enemies, even with 100+ dragons, would flee the battlefield without making a single move.