They're in Relics and Rituals. But off the top of my head, I remember that it deals 2d6 damage, has a 17-20/X4 Crit range, reduces your movement while wielding it to 5 feet per round, it weighs 30 pounds.
Game I DM: 11th level Wizard, the rest of the party is 10th level (The Wiz is the only character to avoid the last TPK )
Game I play in: Dwarven Cleric 8/Divine Disiciple5