Mxy can solo marvel with the possible exception of TOAA+TOBA +Regulator Thanos. He can destroy the multiverse and Marvel Abstracts are bound to the existence of the universes they embody. Beyonders were also killed by multiple universal explosions.
@green_skaar: The beyonders have multiversal energy projection with wank and scaling there actually multi-universal at best since this was Starlin run which is the only run that included the beyonders and they got oneshotted by there own multi-universal explosion.
Make no mistake the explosion was multi-universal because of the cascade effect with universes bumping into more universes and so on, beyonders are still multi-universal at best and they got killed by there own explosion and they only oneshotted a few universes to start the cascading effect
Mxy in the other hand has destroyed infinite universes and he would STOMP it wouldn’t be close
The way DC has written their cosmology is extremely stupid and incompatible with Marvel's. If the battle took place within the Marvel continuity i'd say the White Lords effortlessly delete Mxy, but if it took place in DC Mxy effortlessly deletes the Beyonders.