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Im going to even further off scripterino
greenskins breed with female greenskin counterparts
lizard race breed with female lizard counterparts
its already in lore that beastmen breed with both human women and beastwomen counterpart (but Im going to say it again)
daemons (or more accurately "alternative persons") breed with their daemon female counterparts. But male and female daemons as a whole (irrespective of race) can breed with eachother.
im specifically leaving it vague for a reasonerino as to what could result from said plowing and sowing seed inside of fertile fields
