I've been watching 1967 cartoons on the DC Super Heroes: The Filmation AdventuresDVD. I believe I have stumbled across the most nefarious weapon ever created. It appears in the Green Lantern episode, Sirena, Empress of Evil.
Sirena fires the magnificent Magno-Beam, which is somehow "attuned to Green Lantern's brain waves."
Oh! It also contains a bird.
The bird follows the fired beam directly to Green Lantern's head, knocking them both unconscious.