Anti-Monitor vs Abysss
Abysss-Abysss possesses vast destructive abilities, enabling him to consume virtually limitless amounts of matter and energy. He can consume stars, planets, and even the "stuff of space itself," such that he is able to obliterate entire realities. Although he much prefers the empty void, he can also create animated servants--possibly even living beings. Abysss does need air, heat, or almost anything else to survive. He is fed by the matter and energy he consumes. He enjoys the negative existence of the Void, and loathes "foul matter" of any kind