Geltsingr, the Dragon King
"Legend beholds that the lucky one who finds this majestic beast will unlock its mighty powers."
The Dragon King is extremely rare, as the description implies. However, it will be worth the wait, because this isn't any ordinary coin-giving dragon! The Dragon King has a spectacular gift, nicknamed the "Coin Spell". Once this spell is used, all of your island's habitats will begin to glow, and your dragons' earning rates will double! But, use this spell wisely, because it only lasts for one hour. Also, after you use the spell, you must wait twenty-four hours for it to be available again.
This dragon's habitat is the Majesty Castle, which is connected to your islands and can be summoned for a large sum of coins.
What do you think? It would be great to see a special dragon like this.