Craft a mesmerizing visual representation of a cosmic phenomenon where a vibrant, swirling nebula finds itself inexorably drawn towards the inescapable gravitational pull of a massive black hole. The intense gravitational forces distort the very fabric of spacetime, creating mesmerizing visual distortions and warping the surrounding stars into elongated streaks of light. The black hole's event horizon, a dark abyss that devours all light and matter, looms ominously in the center of the scene, a silent and foreboding presence that spells the inevitable fate of the vibrant nebula.