"This is the thunder-wheel symbol of Turrican, sometimes called Turrican Thunder-Wheel, or Turrican Cuibhle-Tàirneanaich. Turrican is part of the ancient pegasi pantheon of Gods who ride the skies in Llamrei's Chariot, as pulled by Epona. He's said to be responsible for throwing down lightning bolts during storms." Icepone tapped a forehoof toward the air. "And to the ancient pegasi, Turrican was the god of fighting. Beltane was the ancient festival in Turrican's honor, and as gruesome as it still can be today, it was probably a heck of a lot worse before the ancient unicorns created the Totems for us pegasi. That stone you're standing on predates Canterlot city, as does the site of these artillery proving grounds. The base of Canterlot mountain, the only thing for miles and miles around which physically connects the sky to the earth, just as Turrican's thunderbolts do, has been the site of pan-pegasic festivals for eons."