[LDiCesare]

I don't think you can mod the dominion free spawning units, but you could add freespawn to some units like a cheap 0 move priest who previously was useless and expensive. By becoming cheap, the priest would be hired, not move, just reanimate and freespawn some unit.
IT's definitely not the dom-killing Ermor dominion, but you could use MA Ermor and make it look like LA that way, except it wouldn't destroy its population.