The was thought to be magical: when the rightful High King of Ireland put his feet on it, the stone was said to roar in joy. The stone is also credited with the power to rejuvenate the king and also to endow him with a long reign. According to , Cúchulainn split it with his sword when it failed to cry out under his protégé, Lugaid Riab nDerg — from then on it never cried out again, except under Conn of the Hundred Battles and according to legend, at the coronation of Brian Boru in 1002.