Although blind in one eye, Jan Zizka successfully led the Hussites into battle after battle against the invading crusaders in 15th-century Bohemia. When an arrow struck his other eye, he continued to fight—-and win—-while completely blind.
Skynet, the 21st century computer waging a losing war on humans sends a second terminator back in time to destroy the leader of the human resistance while he is still a boy. His mother is the only one who knows of the existence of the Terminators, human-like robots that exist only to kill and are nearly indestructible.
Kakute were spiked rings used in ancient Japan. The spikes were usually turned inward and applied to pressure points by gripping limbs or even the neck, which wound stun an opponent and cause a nasty puncture wound.