""I used to watch them as a kid. My granny told me about 'em. Some cold nights you see them dancin' in the sky over the Hub, burnin' green and gold..."
"Oh, you mean the aurora coriolis," said Oats, trying to make his voice sound matter of fact. "But actually that's caused by magic particles hitting the-"
"Dunno what it's caused by," said Granny sharply, "but what it is is the phoenix dancin'.""
― Terry Pratchett, in Carpe Jugulum (1998)
"I was never surprised that they did not have a phoenix on display. There is only one phoenix at a time, of course, and while the Natural History Museum was filled with dead things, the phoenix is always alive."
The user with this ability either is or can transform into a phoenix, a mythical, sacred fire-bird that symbolizes rebirth, immortality, and renewal in the mythologies of the Arabian, Persian, Greek, Roman, Egyptian, Chinese, Turkish, Indian and Phoenician/Canaanite people.
Phoenixes are described as birds with colorful plumage and a tail of gold and scarlet (or, according to some legends, purple, blue, and green) with a 500 to 1,000, or even 1,461-year life-cycle. Near the end of its life, a phoenix builds itself a nest of twigs or whole trees that it then ignites; both nest and bird burn fiercely and are reduced to ashes, from which a new, young phoenix or phoenix egg arises, reborn anew to live again.