Took a few screenshots in-game on Minecraft and formed a reference to draw this! Sorry the lineart looks kinda wobbly, my hand has been twitching and it's been getting worse recently.
The mod that this dragon belongs to is called "Ice and Fire Dragons in a Whole New Light!" This has got to be one of the best mods in Minecraft, I HIGHLY recommend it, please try it!
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https://www.curseforge.com/minecraf.....d-fire-dragons