Tannenbomber serves as the only and final version of the Joyous Dragon line which also includes the Joyous Dragon SpiritPermanent stat boost which grants +0.8% Critical Hit, +500 Magic Damage, and +50 Magic Find.
ā
Having this Dragon unlocked grants a permanent +0.8% Critical Hit, +500 Magic Damage, and +50 Magic Find
Tannenbomber's name is a reference to "Tannenbaum," the German word for "Gift Tree" or in this case, "Christmas Tree" which is what this dragon was based on.