holy grail, n.All

The Holy Grail (n.) and ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠the spear belong together as female and male, and their reunion in Parsifal is the symbol of complete fulfilment that draws men into the dragon's cave.