Actress Sian Phillips in costume as Boudicca, holding a sword in the air in Euston Road to promote her role is the television show 'Warrior Queen', London, February 8th 1978. (Photo by Monti Spry/Central Press/Getty Images)
And yes, Ninja Assassins are one of them! But who were the fastest, deadliest and most efficient killing warriors ever? Find out here!