Starfire wins

As the fight went on, you noticed that Starfire was rather straightforward with her attacks, while Blackfire liked to use misdirection and nearly-cheap shots.

Slowly, but surely, Blackfire was winning.

Thankfully, Starfire still wore the gauntlet you gave her.

So you secretly began to boost her power. Not all at once, but just enough to turn the tide without anyone noticing you cheating.

You knew that the more you boosted Starfire's power, the more her personality would be altered. So her acting too out of character would be dangerous at the current time.

You did hear once from another dimension about an Elven queen going from Nature-loving hippy to an evil mistress who destroyed her former allies, just from feeling a surge of power from an overlord as he drained her of her power.

You chuckled as Starfire grew faster, stronger, more durable, and ...more vicious in her attacks.

Where before, Starfire would have flown at Blackfire with the intent to punch Blackfire, now Starfire flew and delivered a feint of a punch while delivering a knee to Blackfire's stomach.

Soon, both sisters were battered, but Starfire was able to stay flying. Blackfire was on her knees.

[It seems that I retain my position as Overlord's right hand, sister,] Starfire commented with a smirk.

[It seems so. I guess I'll continue to rule over Tamaran for the time being,] Blackfire replied, already planning on finding some artifact to boost her power to not only defeat her sister, but to make you her ****. All because she felt humiliated.

[Have you forgotten? The terms of the duel did state the loser obey the winner,] You said.

[It is true, Komand'r. As long as you are in Koriand'r's presence, you obey her,] Galfore said.

[Yes. I had forgotten in the heat of the duel,] Blackfire said.

{Let me prove my healing power,] You said before gesturing to the the princesses with your hand. Light sparkled out of it and came into contact with the sisters, who healed in moments. [Let us continue with the feast before I and my partners continue our guerrilla warfire with the Gordanians!]

You smiled as you heard the cheers.

The feast was uneventful and you returned to your tower.

Seeing a few Shadow Master Goblins holding a gem and a couple of metal wrist rings, Starfire asked, "What are they for, Overlord?"

Blackfire wished she had kissed you to learn what you and her sister were speaking about.

"They are for your sister, Komand'r," You said, picking the gem and crushing it with your magic gauntlet hand.

You then slapped Blackfire's rear.

[You dare to strike the rear of a Tamaranean Princess?]Blackfire hissed before you pulled down some of your bandages and kissed her.

As you did so, a tattoo appeared above her rear. This was no ordinary Tattoo, but one that would allow you to either use pain or pleasure on her, whenever you wanted to.

As Blackfire was too stunned to react, Starfire was frozen for a few moments before she cried out, "Stop that, Overlord! It should only be done with me!"

"So he had good taste... but that still doesn't give him the right to slap my behind," Blackfire replied.

"The kiss was to allow her to speak english, but the slap was to allow me to be able to safely put a restraint in case she disobeys," You answered. "Feel free to check above her butt."

As a minion brought Blackfire a hand mirror, Starfire flew around her sister and gasped, "What a cute design!"

The symbol was a a series of circles, put together to look like a flower.

Getting the feeling you knew something she didn't want anyone to know, Blackfire looked towards you.

"And now the metal wrist rings," You said, putting back on the face wrappings.

"What will they do?" Blackfire asked.

"Allow you some access to a power boost. Your sister has a greater access," You said before snapping your fingers and a goblin brought in a few papers.

"Wait, so my sister cheated in our match?" Blackfire asked, sounding both impressed and offended.

"I did not use any boost. It was all my power," Starfire said as she caressed Blackfire chin.

Blackfire slapped Starfire's hand away and noticed the papers. "What are these?"

"Documents that details your benefits for joining my forces, such as medical, dental, vacation, room, board, responsibilities, and weekly payments," You said. "You can sign and have some protection or don't and be at the mercies of your sister and your people's laws."

Blackfire sighed before looking over the papers and signing.

"Now I dub thee Blackfire," You said as Blackfire handed the papers back the goblin.

"Blackfire?" the purple-haired tamaranean princess asked.

"Your sister's codename is Starfire. Codenames are protection against magic that targets true names," You explained.

"I see..." Blackfire muttered as she pondered her situation before she asked, "Overlord, may I have a few minutes alone with you?"

You looked towards Starfire and asked, "It's up to you, Koriand'r."