Gabriel's Trumpet could be a matter assembly-disassembly device

Terrifying dream. No larger than a footling mag flashlight. Five buttons in a cross shape near the mouthpiece. Center and left buttons assemble matter. Sole right button disassembles. All at the subatomic level. The angel I met in the dream was rogue or was death himself. Left eye sclera was hollow. Just an iris and pupil. Roman style tunic blond hair one good eye blue. Never friendly just felt he was there to pass along info. Devastation from such a small instrument was unreal. Woke up to realizing sound existed before light.