I am the perfect witch who is known as the female version of Chrollo.
But I died for no reason, so I tricked the King of Hell with the principle that if I lose a piece of flesh, he will lose a lot of flesh.
So we have the benefit of wearing it.
Although we don't have much ability after time travel, but!
He is still capable of tricking Hisoka, robbing Chrollo, teasing Orochimaru and digging the Millennium Lord to death.
Above