great composition and i love the white lines  <3 such design and rendering skill, awesome 5 stars

So sweet :D

Yah should dig further in this style, you're way good at it

 You've got a great style..I'm glad you found pixel joint.

I do think so. Maybe add some more saturation to the dragon.

 Beautiful butterfly )

wow this is b e a utiful

so awesome :). inspiration for me to continue learning

Thanks to all comments

@ Semont @ schrumpfkopf
Hmm. The outline was bright, and I wanted to separate the background and the main dragon. White line is too noticeable, however.
This time because it is to be transparent, I should have a clean line of the tail.

Thank you, next time I think the balance with the background color.

@ Gecimen
The highlight was to strengthen the particular, subtle sense of transparency, such as the wings of a butterfly that I wanted to express. Other colors are dark for that.

 Very detailed observation about the tail, congrats.

Btw I love this. Although the colors are a bit too desaturated and low on contrast, it's giving a retro feeling. The wings are the highlights.

Absolutely brilliant.

The only thing I can critique about this is that you tried external AA on the tail and those pixels have become noise instead. The white outline is also attracting too much attention as well. I understand that removing the outline would take away too much attention to the dragon so perhaps a slightly darker color for the outline would be better?

white outline is very white

There are so much "right" in this. Gorgeous!

Awesome. Epic colors

i like the color and the idea is excellent

 Excellent. Beautiful design.

 Nice composition. Colors are pretty cool too.