Alright. So I have more dragon pics (I apologize but I can't help what I like).
However, this is actually for the end boss of my group's current mission objective.
The party is trying to find the source of a demonic curse that has surfaced on the continent of dragons that effects those with scaled biology (dragons, yuan-ti, tortles, kobolds, dragonborn, etc.). The curse is spread like a zombie plague, through injuries that get the curse into a susceptible victim's blood stream where it begins to crystalize the blood and veins, and causing rainbow color crystals to form from the wounds of the victim. If the victim reaches stage 5 of the curse, or dies before the curse is lifted, their soul is ripped from them and they are animated by the demonic curse's vile energy into one of the various types of Crystalline Husks depending on the original creature. Think the red templars from Dragon Age Inquisition or the Shardscale Incursion if you happen to have the "Arora, Age of Desolation" 3pp supplement from Ghostfire gaming. The party learns through a group of Hill Giants trying to hold back this growing Crystalline Horde that the curse resists all magical means of dispelling it, meaning that this curse can only be lifted by destroying it's source. What is that source?
A corrupt, demonic Rainbow Crystalline Dragon guarding a massive black soul gem housing all the poor souls taken by the curse, that's what!
Here our the first set of attempts.