I Sing the Body Electric

Hello darkness my old friend, please allow me to introduce myself, I'm a street-walking cheetah with a heart full of napalm, and I'm sure all that glitters is gold. I'm often inclined to borrow somebody's dreams till tomorrow. I need a fix 'cause I'm going down. So before I sink into the big sleep I want to hear the scream of the butterfly. Pleased to meet you, hope you guessed my name. Manta Rays.