"Okay, fine, then why do you think she would just let them kill people? Actually, why do you think I would, personally I would take offense to sphinxes killing dragons just because, and quite frankly I'm scarier than both of you."
"Actually, it would be, because the person with control over the resurrection can say, 'No, I will not resurrect any more of you, and also, here, meet my invincible scary magic friends, they do not like murder.'"
"Okay, you're right, I don't. How powerful is she?"
Your competition is the invincible demon that can make black holes, and the invincible angel who can turn people into vegetables. Literal vegetables.
"That's - really not specific? When you say 'nearly,' what's the nearly include?"
"Fair," she sighs. "But there's - some serious competition, when you say 'nearly anything.' I am obscenely scary. My boyfriend, too."
"I don't think you actually understand. Where I come from, it is a kill on sight offense to summon an unbound demon, because that is the fastest way to put them back. Because demons are worse than angels. Once there was a rogue angel and it was a smart and strategicly sound decision to nuke him, despite the fallout in the surrounding area. It didn't work. It took months to track down the person that summoned him in a hospital somewhere, because he had another face, was incapable of moving or speaking or asking anyone to kill him and was reduced to mentally being a vegetable, until at last they ran a DNA test and figured out who he was. That only happened because the angel was in a rush, if he'd been more careful there would have been no trace to figure out the man was the angel's summoner and he would have kept running rampant. And do you know what he was doing? Turning people into furniture. Literal furniture, that could think and breathe. But they couldn't move, or speak, or even scream. He force-fed them so they wouldn't die, until the area was hit with the aforementioned nuke, and even then someone had to stop by and mercy kill anyone left. That is what I am capable of, I am obscenely scary."
"I'm pretty terrible at lying, I'm not going to pretend I'm not actually terrifying. I'm not threatening you, I'm not planning to do anything in particular, actually, I still want a solution where you're not dead or in a fate worse than death. I'm saying, in most cases, I pretty capable of stopping even scary people from genocide."
"I'm pretty sure she would help, actually, she dislikes genocide, too."
"Okay. That, right there? Is racism. You've never sat down and spoken to her, once, you've put her on the defensive by trying to kill her, kidnapping her, and torturing her. You have no idea what she's like. She hasn't killed you, even though it would be tremendously convenient and not even permanent, she hasn't tortured you in return, hell, we haven't even gone looking for any family of yours to see if they share your values. She is not whatever you think sphinxes are like."
"Except. I only recently got here. The 'let's not kill the dragon, even knowing where he lives' idea? Was decided before they found me or my boyfriend. She didn't even know I existed."