Drawn by  sonicsweeti this is the main Good-aligned deity for my personal fantasy setting (in fact, the other gods generally worship him as their god) - basically, he is to my D&D-flavored fantasy games what Aslan is to Narnia, and like Aslan is less powerful and less cool than the real Jesus even if some of us might think this version looks a little nicer due to our own psychological issues.

His scales are too small to be individually seen in the view of this reference image, and a pure, clear, transparent light blue in color on most of his body with some transparent yellow on his underbelly; you can only see through to his muscles and intestines in certain lighting, normally he's reflective enough to look opaque. Seeing the muscle definition under his skin adds to the already-respectable intimidation factor of being a 100 foot long dragon who is somehow alive despite having clearly been fully decapitated once.

Adherents of his religion are called Crystians, his holy symbol is an executioner's axe of the style that was used to behead him (so any double-bitted axe can work as a holy symbol for one of his priests/paladins). The axe is sometimes simplified to the point of being depicted as a cross, having a wide array of stylistic variants. His domains are Light, Life, and Death and he is Lawful Good but allows Neutral Good, Chaotic Good, and an occasional Lawful Neutral priest to be empowered to do his works on the mortal plane. There are two parallel religious offices, one that only allows men and one that only allows women, referred to as priests and priestesses in plain English and collectively as clerics, but it's made clear that in the original draconic tongue these two offices had names with little if any overlap. The vow of total celibacy is optional (and commonly taken), but if not opted into a priest is only allowed to marry a priestess or vice-versa.

Most of the trappings of the usual pseudo-medieval pseudo-Catholicism that is the default religious motif of D&D games (especially classic OD&D, Basic/Expert, and 1st edition AD&D) is present here and slightly more justified.

Minor religious icons include crosses (as mentioned before), pentagrams and hexagrams, a white flower called moly (Holy Moly, which blocks enchantments and transmutations), fish (Holy Mackerel), and shamrocks. The in-universe reasons for all these symbols aren't perfectly remembered so players are free to make up backstories or explanations of their own without contradicting canon.

He hatched from an egg laid by a virgin dragon on December 25 sometime in the first century.