Die Hard Dice metal 7-die set: Drakona Embers Inra
"Born from violent combustions, Embers Dragons' ash-speckled scales make them distinguished from other dragons. Each of the Embers Dragons bear these markings and reign over their respective territories: Inra of the seas, birthed by hydrothermal vents, Nali of the flame, hatched in molten rock, Bacu of earth, born of explosive decaying flora, Sein of the skies, sprung forth from lightning, and Cazn of the rift, violently derived from the tearing of space and time...
"Bacu dragons nest exclusively in mounds of rotting plant material, and their eggs lay dormant until the extreme heat of spontaneous combustion triggers them to hatch. Because of these specialized requirements, it was historically common for a pair of Bacu dragons to go decades without successfully raising a single clutch of eggs, leaving behind many abandoned nests that failed to ignite. In the past several generations however, their numbers have increased exponentially with their nests now being among the most successful of any species."
--From the Die Hard Dice website