More training and your new form

You wake up the next morning and are greeted by a welcome sight: according to your dungeon summary, seventeen pieces of obsidian are now stored in your treasury. At this rate it'll only be a few short hours until you can upgrade your daemonic altar and see what options it offers. You slide out from under Ari's sleeping arm and out of bed. Might as well pay your new residents another visit while you have the time.

"Huh? What?" Mariel groggily opens her eyes and as you close the door to her cell. She retracts her wings, which she was seemingly using as some sort of cocoon to sleep in, and walks over to you, dropping to her knees and grabbing your semi-hard dick. After a few pumps of her supple hands bring it to full mast, she begins licking up and down its length like yesterday while her other hand plays with the tip. Given her sudden eagerness you wonder if you can move things along, and you place a hand on her head and gently guide it upwards. She looks at you questioningly and you give the gentlest smile you can manage, keeping your mouth closed since jagged teeth don't really add to the look you're going for. When her mouth reaches your tip, you nudge it slightly against her mouth, and she licks it a few times in response. Another nudge gets the message across, and she experimentally takes half of your tip between her lips. She sits that way for a second, pausing with a pensive expression, and then sinks her head just enough to envelop the rest of your cockhead and begins to work her tongue again.

Despite her lack of experience, the angel shows a surprising among of enthusiasm, and you groan and reach out a hand to stroke her wing. She shudders in response to your touch and bobs her head just slightly up and down on your shaft. You resist the urge to push your cock down into her throat as the sensation builds, then warn her just before you burst. She pulls back a bit too quickly and falls backwards, falling onto her splayed wings, and you cover her form with your seed before magicking it away a few seconds later. She gives another one of the quiet thanks that you've grown accustomed to, fixes her robe with a slight blush, and returns to her seated position against the wall. You look at her expectantly.

"Hm? Daemon, what do you want?"

"Weren't you going to ask a question?"

She looks at you confused for a moment then blushes fiercely. "Oh, uh, yes, of course! So, uh, how did you summon me?"

You tell her the basics of how your summoning circle works. "I just needed your name at the end, and your sister kindly gave it to me."

"Wait, Sera betrayed me!?" Her face falls at the thought, and tears run down her cheeks. You step over and embrace her, and she hugs you back. You smirk a bit at the thought of comforting your captive.

"Don't worry, your sister loves you. It was just an accidental slip of her tongue. She didn't know."

"I-is she okay?"

"She's just fine, Mariel. Now, I think that's plenty of questions for today. Consider it a reward for your excellent performance." You ruffle her hair, eliciting another deep blush, then turn to leave her cell. "By the way, the next time you see me, I may look a bit... different."

After another bath, you return to the pit, this time to the first sister's cell. She's sleeping when you enter, so you close the door as quietly as you can, and take a seat a few feet away from you. You lazily watch her face and the rise and fall of her generous bosom as you idly guess at what forms you might be able to change to later today. Eventually she groggily opens her eyes, then, seeing you, crawls over to your position. You imagine she simply can't be bothered to stand up to go such a short distance, but the sight of her generous cleavage swaying as she crawls to you is incredibly erotic and your cock goes even stiffer at the sight. She gives a teasing lick up your shaft and then sinks it into her mouth and begins to bob. You rest a hand on her hair and massage her scalp as she delivers her first full blowjob, massaging your length with her tongue while she continues to move her head up and down.

After what seems like an hour of blissful, steady movement, she accidentally sinks a bit too far, touching your cockhead against the back of her throat and gagging. The sensation pushes you over the edge, and you explode as she pulls off your length, shooting two strands into her mouth and then the rest over her face and breasts. She winces a bit at the taste but swallows nonetheless. You clean her off, warn her of your likely appearance change, and leave her with a kiss on the cheek.

As you arrive at the altar you check and see that you've just barely passed the requirements and now have 21 obsidian waiting for you. A few popups and a short wait for a worker later, the completed altar stands in front of you. The new altar is slightly larger, black as night, and with a slight shine to it. The candles still burn around its corners, and the top is surrounded by runes in some sort of language you don't recognize.

Unique Structure: Daemonic Altar (Level 2)
Level 2: Accepts larger offerings and generates more mana. Can empower weak outsiders.
Upgrade to Level 3: Read the inscription on the altar.

What a strange upgrade requirement: you'll need to get someone to do some research into what it says. For the moment, you're pleased yet a little offended to discover that both you and Tlax do in fact qualify as weak outsiders. You only have mana for one upgrade right now, and a certain sorceress is using up most of your income Tlax will have to wait. You select yourself and check the presented options.

Upgrade Form
All upgrades will improve your base abilities somewhat. Choose an additional bonus specialization:
Charm: Specialize in charisma, persuasion, manipulation, and seduction.
Contracts: Specialize in making powerful contracts with adventurers.
Ferocity: Specialize in ferocity and speed, and allow humanoids to ride you.
Ice: Specialize in combat spellcasting and learn to cast ice magic.
Summoning: Specialize in battlefield summoning of lesser daemons, even outside your lair.

You immediately eliminate ferocity: that isn't the sort of riding that you're into, and you don't see yourself as a horse or dog or whatever it has planned for you. Contracts is next: the ability sounds promising, but you've only made one especially good contract thus far, were **** into another, and don't have any mana left for a third—it just doesn't seem feasible in the near future. The remaining three are tough: your brain wants you to pick ice, since it plays to your strengths and gives you some much-needed versatility in combat. Your heart wants you to pick summoning, since it sounds fun and you like ordering minions around. Your dick wants you to pick charm, and hey, doesn't it also play to your strengths somewhat?

You reluctantly eliminate summoning from the list. At this rate you'll have the chance to buy more champions sooner or later, and as cool as it would be it just doesn't feel necessary. After a few more minutes trying to decide between the remaining options, your finger hovers over ice. It just feels like the responsible choice. Thinking about it that way makes you pause. When have you ever been responsible? Almost everything fun you've done since becoming a boss has been irresponsible. It hasn't all worked out, but enough of it has that you don't regret a moment of it. Sorry, brain: charm it is!

You grunt in pain as you feel your bones breaking and flesh boiling as your body rearranges itself in a burst of flame. Your chest and limbs broaden, your face shifts into that of a human man, and your horns and wings grow slightly. Your tail grows a sharp, pointed tip and extends several feet behind you. Grunting in pain, you walk over to the nearby pool to see your reflection. You don't recognize the face staring back at you: you look like an attractive human man—albeit with red skin, horns, and a tail—standing slightly over 6ft tall, with defined muscles and black, batlike wings. You open your character sheet to see what's different.

Azazel, Level 10 Lesser Incubus
Attributes
STR 35 (+7), DEX 45, END 33 (+3), CHA 49 (+12), MAN 62 (+11), APP 46 (+20), PER 38, INT 52, WIT 45 (+4)
Feats
Subtle Appearance – You can hide some or all of your monstrous features at will.
Supernatural Lover – You are unnaturally skilled in bed.
Weak Wings – Your wings allow you to fly short distances in addition to gliding.

You grin at the changes. The wings and disguise are both very welcome, and the major increase to your social stats will no doubt go a long way in the tricks you pull to get out of tough situations. However, what you were really hoping for—and what you look forward to trying out—is something like your new supernatural lover skill. Ari will appreciate it and the twins won't know what hit them.

You step out of the room with a spring in your step, contemplating where to go next and try out your new powers, when Baelzann comes barrelling down the corridor with his signature "booooooooooss!". "Ah, boss, good to see you!" He gives a quick salute and then starts inspecting your new form. "Nice look! Any chance I can get a makeover?" You wave a hand in front of his eyes. "Oh, right, sorry, urgent news! Hit hard: bunch of adventurers. Rishu slowing 'em down best she can. Need big guns!"

Annoyed at the interruption, and yet a bit eager to give your new form a spin, you rush off to rally your champions.