Trapped in a pitch-black void, a single King appears before you. You battle, exchanging blows, and just when you think you've won, a second appears. Then a third. Then a fourth. Then you die.
They spawn in every 40 seconds until you're facing four Kings, giving you less than a minute to kill one before you become outnumbered. And with the four of them all wielding magic swords and homing missiles, it's all too easy to become overwhelmed if you can't slay them quickly enough.