Homebrew, Book of Erotic Fantasy (3.5e)
3-level Transmutation
You choose a creature within range & hold the mirror towards it while reciting the spell. The creature must make a Constitution saving throw.
On a failure, the targeted creature's biological gender is reversed for the duration of the spell. This has no effect on the creature's ability scores, class abilities, or species traits.
If the targeted creature engages in sexual intercourse during the spell's duration, a creature that has become biologically male is fully capable of conceiving a child. However, a creature that has become biologically female is unable to become pregnant unless the gender reversal is made permanent.
The creature can be restored to its original biological gender with the another casting of the Reverse Gender spell, as well as with either the Dispel Magic or Remove Curse spells.
The spell has no effect on a creature that is currently pregnant. It also has no effect on creatures that have no true gender, such as constructs, oozes, & plants.
When you cast this spell using a spell slot of 4th-level or higher, the duration of the spell increases by 1 hour for each slot level above 3rd-level. If cast at 9th-level, the spell's effects are permanent.
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