That might work, but wouldn't copying a spell still require replacing the unit the original spell transformed the unit into, in order to get a new one?
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You've sailed off the edge of the map--here there be badgers!
What I'm trying to do is to create a spell that gives a Niefel Jarl an ice-drake mount(a big one)-and I figure the way to do that is to make a spell that replaces a foot-jarl unit with a mounted jarl unit.
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You've sailed off the edge of the map--here there be badgers!
If I were you I wouldn't worry about being so specific about things, just make it a new creature no ones gonna complain because it seems a little bit un realistic where that jarl came from, well I won't!