That's not statistics reduction. She
sealed him and his
powers away. It's specifically refered to as
binding the opponent in paradox
chains, which locked both Grandfather Spider and his Chaos Heart.
The entire purpose in the third arc is to make sure the Chaos Heart doesn't escape it's seal/bindings
A lot of them. And you didn't even address all my points.
Edit:
https://youtu.be/_KrE26pNIUM?t=158
All I ask is that you help me break the chain to get my heart back!
Context: Spider couldn't reach the heart without the destruction of the paradox chain, as it was locked away at husk, the center of the universe
https://youtu.be/BrYMIz518Wg?t=10679
"And what is your grand plan? You can't reach the heart either!"
Context: Again, the heart is binded with the paradox chains/locked away. Raven made it so even she couldn't break the paradox chains and the only thing that could was her daughters essence
https://youtu.be/dYETdCiiDk8?t=7095
Mellori! Break the chain!
What? Are you kidding me!? We cannot risk untethering the Chaos Heart!
- Mellori breaks the final chain (Storm and Myth chains) that binds the chaos heart*
"The Chaos Heart is free from all it's bindings now"
Context: The only way to reach the heart was to break the final two chains of storm and myth that were locking it away.
So her, her sealing is broken:
Sealed a type 1 abstract being, sealed away most of his powers while he was trapped away, making him
Infinitely' 'weaker than he used to be. Sealed his heart in 6 different sources of magic, each having a
infinite amount of said magic. Even characters who had
shadow magic, the power to manipulate Reality and it's very fabric, couldn't free the chaos heart from it's bindings