You are chained to what look to you like some sort of altar, the kind that were used in old times to offer some sacrifice to the fake gods. You can't move much, beside looking on both side.
You can see women placed in concentric circles around you. They're all wear some sort of long hooded dress that hide their entire body, their face obscured by their hood's darkness. You don't know why, but half of them wear a dark-red with black robes with trims, while the other half wear white robes with clear-blue trims. It seem the two aren't chanting the same incantation, because that is what they are chanting, incantations to let their masters know, who ever they are, that their offering, in this case your life, is waiting for them.
Time pass, and you sense not one, but two things coming from the deepest part of hell entering your body. You're both burning and freezing all over, inside and out. It's almost like two demonic entities are battling inside you, wanting to take over your body. You don't dare taking part in the battle right now, knowing you aren't strong enough to face a demon, let alone two of them. But you can feel their are evenly matched, and so wait patiently the two worn each other out.
Soon enough, you sense the two demons tiring out and take your chance. Before you can understand how, you beat the two of them, and the mixed sensation of cold and head in your body only intensify, joined by an intense mix of pain and pleasure, to the point of everything become a blur to you.
Slowly, you come back to your sense, and see you somehow broke your chains and shredded the meager clothing the women let you wear. And while you vanquished the two demoness who tried to take over your body, your body still changed a lot. Beating them made their powers become yours, changing your body accordingly.
The dark-red cultist had tried to call a succubus on earth, and from said demoness, you gained a taste for lust, along with a long tail ending in some sort of blade. You also see that the toes on each of your feet fused into two giant claws, making it look almost like you had cloven hooves instead. Strangely, your fingers stayed unchanged.
Ironically enough, the white clad cultist for their part had tried to call on earth a yuki-onna, the Japanese counterpart of a succubus. Unlike its occidental counter-part, a yuki-onna feed on body heat, often doing so by sleeping with a man who will then die from hypothermia. From this Asian demoness, you gained the apparent of a sexy looking young Japanese woman, albeit one a bit pale, a taste for consuming the body heat of others, blue eyes, and a precise control over snow and ice.
But you can also feel that the women around you, who were human when they called the two demoness to take over your body, had changed into succubi, for the dark-red clad ones, or into yuki-onna for the white clad ones, which make them your new subjects. You are their queen now, which explain the two bat-like wings in your back. And while being their queen mean they can't disobey you, it also mean you have responsibility toward them, responsibility you may have some difficulty to act upon, since you still have your human mind…
…But have your mind really stayed as human as you believe? After all, being a succubus/yuki-onna hybrid feel just natural as being a man used to.