In an underwater city..

Far under the surface of the ocean, down where the water pressure began to crush the unprotected form was a city made of stone, carved by hands and magic, this city housed an ancient race known as the Deep Ones. Immortal save via physical death, they conducted rituals and acts that had goals known only to them and the ancient beings they worshipped.

In a chamber of this city, knelt one such Deep One, he was unremarkable from other Deep Ones, save that he was in excellent health and form. ‘Young’ might be a word for him even though he had seen countless generations of humans live and die. Before him on the wall was a swirl of eye bending lines and marks, part of an ancient gateway that could propel one through space and time and to other universes. He was here as part of a mission that was handed down by his elders.

Deep Ones had long bred with humans, creating hybrids that would eventually fully transform into another Deep One, such couplings helped keep the bloodlines strong, but he was part of a mission to spread their seed across different universes. The portal before him would transport him to these universes and he would seek out healthy women to breed with and either bring them back to the city or their offspring. He was given several tools to help him do this.

First was a spell that would cloak his form as a human male, he would be able to alter his appearance in order to become appealing to his mate-to-be and it lasted as long as he wanted.

Next were implanted pheromone glands. The courtship rituals of humans were known but seen as very bothersome and so he was able to secrete aphrodisiacs into the air in order to increase interest and arousal. As well as deliver it into food. He was also able to increase fertility as another effect.

The last, besides basic gear was a spell that could gauge health and genetic make-up in order to decide which female was best to approach. While common females were suitable, if he could find ones with special abilities and qualities, they would be very preferable.

The Deep One stood up and began chanting, a language that no human throat could mimic sounded from his throat and the lines across the wall began to bend, and with them, space parted into a portal that would allow the Deep One through.