Challenge:
"We've all read of when Naruto is born of a devil family. Read of how he's betrayed in some way. and even of him being part of the Phenex family. But what if Naruto's heart had grown cold after being betrayed by those/the one he had once shared his own heart with, his dreams, and his hopes for the future? Naruto Phenex warm heart changed that day, and with a heart as cold as the furthest reaches of space; a new power is borne from the void"

My idea:
Naruto Phenex is betrayed by his family/fiance/wife (any faction. I never understood why only his own faction had to betray him. Maybe he wanted to marry an Angel, Fallen Angel or Human. Or Goddess)and in his new desire for the pain to "stop" he gains the ability to shift his unquenchable flame for an unending winter as he becomes a Pheonix/Phenex that can BURN COLD. Water and wind and fire, the length it takes for him to gain mastery is up to you to decide. Since ice is a better form to "stop" his pain as opposed to flames which would "destroy" it, his shift in mentality and psychology brought a new aspect of power to the fore.

-Naruto Phenex, Wings Of Cold - Naruto The Ice Phenex - Naruto:Heart Of Winter-

1. I prefer OP Naruto but that really doesn't matter in the end for me. So a little mixing of any ice powers from any anime is ok by me. I would prefer though, that he, as an "Ice Phoenix", could enact some form of Haku's Demon Ice Mirror Jutsu or something like Obito's Kamui as long as ice is involved. Teleporting anywhere he is touching ice is to another area the ice is touching(i.e. like Minato's Hiraishin but with ice as a medium and not a kunai/seal. Not ice shards though as that might be too OP) and intangibility with ice attacks. and naturally, cold or watery areas would boost his strength a bit since it would make using his powers easier to use.

2. His new tears could lose their healing ability in exchange for a form "immortality" that stops the age of it's consumer as long as they keep taking them...just an idea.

3. Could also has a parent whom has ice based powers too of course, but I figure the above idea might have a better drama aspect. Him in some way gaining by accident (Ice Ice Fruit :P lol) or experimentation with an ice based Sacred Gear isn't something highly original. but whatevs.