A large block of Truestone which the Storm Bull used to crush the Devil.
- It is a huge rectangular solid, nearly one kilometre each side, 1.6 kilometres high.
- Originally part of the Spike
- It was hurled asunder when the mountain exploded.
- It knocked down several stars from the Celestial Desert
- It dented the Sky Dome at the Black Spot
- It landed at Ex before bouncing here
- A long marsh-filled trench marks where it skidded to its present location.
- A pathway is known to lead to the top.
- Atop there is a family of Griffins.
- Praxians believe the crushed Devil was the Devourer
- The Heortlings believe it was Wakboth.
- There are also different traditions about what the block is: Storm Bull's Heart or a piece of the Spike.
- The Storm Bull people here fanatically keep treasure seekers away.
- Their slaves scour the nearby region searching for chips and pieces for the High Priest.
- He alone determines which pieces may be traded to outsiders.
Sources: Guide to Glorantha, Cults of Runequest: The Prosopaedia