FREEKN’ YES! 
Tis’ bout time!
Aw man… I gotta do this now. Can’t say I’ll put as much time as I would prefer, but I got to give this “VFX Puzzle” a shot.
SO! Just to make sure I understand this 'er challenge: The only -one- texture allowed. That -one- texture must be a uniform circle of either soft or hard edge. With this limitation (which essentially is a restriction of sorts on UV trickery), make a magical fire effect.
Everything else is fair game.
Question: Since a texture is not provided, when we collectively create our one texture I expect to see a subtle size diffrence. This is ok? We can make the Circle as big or small as we would like on the one texture?