Die Hard Dice metal 7-die set: Drakona Embers Sein
"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...
"On the peaks and calderas of barren mountains, Sein dragons gather in incredible numbers once per century, crowding together in massive nesting colonies. Similarly to common seabirds, the Seins will remain in the colony for weeks or months at a time without food or water as they wait for hatching conditions to reach their peak. They arrange their eggs carefully on outcroppings of solid granite, guarded by the last season's young."
--From the Die Hard Dice website