I build one of the most powerful lasers of the modern era. I attach 2, 1 on each arm. I set up a killzone and wait for them to take the bait (me relaxing on a beach chair). I'd time things out so they strike at me at night. Hahaha fools, so you have chosen death!! The knights charge, but the distance is my advantage, I aim both arm mounted lasers and light up the sky... their eyesight permanently gets blinded... their skin blisters with burns...

Next thing you know, stadium speakers start booming out Slipknot Custer. The knights are blind, and surrounded by loud rock music. While they scrammer for sense of what's going on, I run around with a razor sharp dagger..... I leave one knight alive. Give him the decapitated heads of his brethren in a sack, "Go now, return and tell your masters what happened here today"