Originally posted by Sin I AM👆
Didn't mxy...or wasnt his power used to own spectre in emperor joker
Emperor Joker(who, by Spectre's own accord, was an inept n00b with Mxy's power) owned/overpowered/overtook Hal-Spectre, before warping him/it into a parakeet and imprisoning him/it inside a birdcage:
So yeah, this is no contest.