What is the definition of Deeper Weapon?

A 'deeper weapon' is like a secret spy gadget that's buried so deep under the surface, you've gotta dig really hard to find it. It's not your average tranquilizer gas or tranquilizer darts, but instead, it's a high-tech, ultra-dark weapon that's so discreet, you might as well be playing hide-and-seek with your cat while wearing a submarine.

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Here's an unsettling example sentence: "In the quiet of the night, when the moon was a smiley face and the stars were just trying to sleep, the deeper weapon whispered 'urrender' in my ear through the crack of my own skull, convincing me my brain was the only thing standing between me and oblivion."