This is a great mod, and a great port of a minecraft mod called Ice and Fire which does exactly the same things to a T. It would be better if that was mentioned in the description, as while this mod doesn't reuse any assets or code it's clear where all of the ideas and mechanics came from.
Disregarding that: good mod, visually pleasing, and deserves recognition for that.
I appreciate the positive review, and the comparison is (to an extent) valid. However, most things come down to source material. Most of the ideas in this mod come from George R. R. Martins "A Song of Ice and Fire" series of novels, which is the same source material that Minecraft mod uses. The only thing in this mod that I used the Minecraft mods influence for is the Cavern Spawning setting, which directly credits Ice and Fire in the settings menu. As for doing the same things to a T, If you have good examples of anything being an exact copy, I'd love to hear them.
EDIT: The Summoning Gem was also inspired by Ice and Fire, my bad. Didn't include it in original post because I forgot it was in the mod. I've merged its ability into the Dragon Horn.
After looking a bit closer it appears that everything is superficially similar to Ice and Fire, for example the way the dragon forge works and how it's made, however there are enough minor differences that it could just be because of the same source material. The main difference I can spot after going back to play the latest version of I&F is that this mod is just about dragons, while I&F has every mythological creature under the sun.
That said, there are quite a few things that seems too similar to be concidence, mostly the recipes for dragon forge blocks, how it's built and how it works, things like scale blocks and stuff.
Recipes for the forge blocks aren't intended to similar, ironically enough I used scales for the recipe because I needed to find a use for scales without doing armor in order to avoid being too similar to Ice and Fire. Most other things that I know are shared between the mods have a similar root in the source material: The Dragon Horn is based upon the Dragonbinder in the novels and Draconic Steel is based on Valyrian Steel.
That makes sense I guess. If you ever want some textures by the way, I can make some; yours are pretty good but they lose contrast in some lighting/surroundings and could stand to gain some smaller details like hue shifting and material-accurate highlights, especially since you use in-code colorization.