Procreator Potion
To be brewed by medical professionals only.

When properly made, the addition of a bit of hair from a donor will infuse the potion with said donor's genetic makers. To be taken by a stallion only. After drinking, the stallion in question will have his DNA replaced by that of the donor's for all of his sperm, both preexisting and newly created, for the duration, typically lasting eight to twelve hours.

Prescribed usage: To allow one mare to have a biological child with another, via the medium of a stallion volunteer.

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