Definitely tasked genies next.
So...
Creating nasnas is a complicated and vile process. A spellcaster must first create a magical fruit, called a
nasnas fruit. The fruit must then be cut in equal halves. The spellcaster must then convince a humanoid woman to eat one of the halves (methods range from conventional trickery to magical coercion). The nasnas will gestate for nine months, acting in all manner like a typical pregnancy. The woman will conceive and in nine months give birth to an infant nasnas. The nasnas quickly reach maturity six months thereafter.
One nasna can thus be created from each half of a
nasnas fruit. However, a woman can only bear one nasna at a time. Greater nasnas can be created using more powerful spells in the creation (and at greater costs).
Nasnas Fruit (2 HD nasnas): Faint conjuration; CL 3rd; Craft Wondrous Item, summon monster II; Price 4,000 gp.
Nasnas Fruit (4 HD nasnas): Moderate conjuration; CL 7th; Craft Wondrous Item, summon monster IV; Price 8,000 gp.
Nasnas Fruit (6 HD nasnas): Strong conjuration; CL 11th; Craft Wondrous Item, summon monster VI; Price 12,000 gp.