Possible Clues:

• Excellent burial arrangement for Arthur's sword
• Legendary sword
• Smart rogues and rascals take something for granted?
• Weapon whose power only one man could unblock?
• The legendary sword of King Arthur
• The Sword in the Stone?
• 1981 film in which Helen Mirren plays a sorceress
• Noted weapon, a club Rex and I toyed with
• Weapon of unknown ability announced
• Weapon of old bore, we hear