I would like to request a spell for elemental. It was present in Master of Magic, but I can't remember the name. With the spell - let's call it chaotic mutations - you would make the target unit a "chaos" unit plus it would get a random mutation. I don't know if units will get attributes like "chaos" or "angelic", affecting their resistances to certain damage effects, but the mutations would be really cool.
I generally find spells giving +X to a stat with an upkeep of Y rather boring. Chaotic mutations was fun because it always gave a random mutation. The mutations were not just stat bonuses, there were mutations such as "horns" which gave an extra horn attack in melee or "wings" to give limited flying ability.
In short, I would like my spell books spicy and varied, thank you very much.