"It's dangerous to go alone, take this!"

Thanks for the sword, lady of the lake.

Strange women lying in ponds distributing swords is no basis for a system of government. Supreme executive power derives from a mandate from the masses, not from some farcical aquatic ceremony....

No! That’s not my sword! Mine’s wooden!

As someone who's kind of a nerd for this stuff, it's always annoying when people say Excalibur was the sword in the stone. Caliburn was in the stone, Excalibur came from Vivian of the lake