There are quite a few basegame units that could do with this ability though. It will be a good way to spice up some less interesting summons and pretenders.
I'm pretty sure #plainshape isn't "shape in plains" but "the plain shape". A #forestshape unit needs a command to change it back into a non-forest-shaped unit, just like #watershape unit needs a #landshape.
No no, clearly #startaff is "start affinity" where the units have an affinity to where they were recruited/summoned, and take damage when leaving the province
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