What could I say for this fractal...
A critique ? It will be hard but I'll try.

First of all the main shape.
This kind of shape is simple but how it is efficient !
But all depends of the gradient.
The main 4 "guides" line give all the depth this fractal need as the look like flames coming out for hell (or heaven ? with this light blue)
The spiral all around the 4"main" lines give this awesome effect of tube.
The rest of the background give the atmosphere a really oppressive aspect.

Now the gradient.
As I just say before with those kind of "basic" variation, the gradient often makes the fractal look great or not...
Here you really play like a master with your gradient.
Three main colors : Red Brown and Blue. Here are the key to this deviation.
These magnificent flames that spring from this light blue center give me the image of : flame spring from heaven.
The way the red central spiral is more highlight that the rest improve this burning effect the flame could provide.
To finish this touch of blue at the end of the flame give this awesome realistic aspect .

To conclude :
Here we've a really perfect exemple to show everyone, that with "basics" variations we could make some awesome stunning work!
The real secret is in the gradient and here is a master exemple.

keep it on it's awesome