Cold warm-hearted

SCP-XXXX, often referred to as "Nyx" Is a Euclid class SCP, notorious for his overall cunning, strength and peculiar abilities. He is a humanoid, seemingly a normal human male in his early twenties at first glance, but obviously not so. He is a generally friendly enough SCP, and specifically asks to wear its own clothes.
He often wears a black jacket, grey T-shirt, jeans, a scarf (Almost always covering its face from neck to nose.) And running shoes. It has distinct orange eyes and a small scar on its (barely seen.) Mouth. Its hair is brown and straight, with a purple streak. It seems to be, again, a seemingly normal person, but it has shown to have strange abilities.
It can burn itself to ashes in an instant, (studies show it feels no pain doing so.) And can reappear seemingly wherever he wants. No way to prevent its escape has been found, so it seems to prefer it in the facility, unlike many SCPs.
Additionally, it can seemingly not be killed, for if given a fatal injury, it will do as he does with teleporting, crumble into a pile of ash and rise back up just as fast, completely healed. Its third and final ability is to turn into a completely different form. Its eyes begin to look as if they have been consumed in magma, and a trail of fire comes off of them. Additionally, it grows wings with the same characteristics, each exactly one meter, (3.6 feet) while in this form, it hovers over the ground, with seemingly no help from his wings.
While in this form, it can summon and control not only fire, but a large, fiery bird (Phoenix?) That is about three meters long, (10.6 feet) and two meters, ( 7 feet) fall when standing. The bird seems to see SCP-XXXX similar to how a dog sees it's master, vice versa. Though we've never seen SCP-XXXX ride or mount the bird, it has a saddle. The bird can stay with him as long as two weeks, then simply disappears for an hour or two. SCP-XXXX calls it "Fin" Indicating a male. Unlike most sentient and powerful SCPs, SCP-XXXX has no opposition to performing assassinations, kidnaps, etcetera.
Its main weapon during such activities is a dagger made of an unrecognizable black metal. Though it demands payment for such things, bargains. Such as; a nicer bed, a computer. (Constantly monitored.) Monitored trips to the outside world. The SCP foundation meets some requirements, but it simply refuses to do anything if not enough are met. It seems has a split personality. For example, if you are just talking to him, he will most likely be quite friendly and perhaps make a joke or two. (Though it has been proven it has social anxiety) but under certain conditions, such as if you treat it as a subject, or without respect, or ask him a very personal question, he will become somewhat agitated, but most of all, if you look at it without its scarf or something covering his face, it becomes very agitated and will demand that you leave immediately.
Failure to comply will result in either a third degree burn or death, which is one of the only reasons it is labeled Euclid, and not safe. His privileges includes sharing breakfast, lunch, and dinner with the staff, (who often ask to pet Fin.) Monitored trips to the outside world, a computer, and a nicer than most bed. It does not answer many questions. It only says that one day it woke up and saw Fin, who, after a while it attempted to ride the bird. When it landed, he was like how it is now. Its cell is about 10 meters (35 feet) across, and has a desk, computer, and bed. (The computer is strictly monitored at all times.)
Though most SCPs do not get this kind of comfort, quite frankly if the foundation gave it any less it would leave or burn the facility down. Currently, SCP-XXXX is being deployed in MTF Alpha-9, last hope. (A task force dedicated to training and deploying humanoid SCP objects in the field.) Overall, Nyx, full name [DATE EXPUNGED] Is a strange, powerful, almost God-like SCP, but prefers to stay in site 77.