In the heart of the Paradox Demon, the least threatening is rather the Martial Saint.
The Great Imperial Pillar is the same, an immovable Ninth Rank, as long as it leaves the range, it loses its threat power.
Because the Martial Saint must maintain the Sky Curtain, it cannot go all out, only able to offer a couple of sword strikes.
Those sword strikes cannot kill It, at most they can slightly decrease Its body mass.
Other places are not much different, can't say there's no threat, but after all, they're just a group of Eighth Ranks.
Then there is the Dragon Emperor.
The Dragon Emperor possesses the ability to trigger the Pingtian Crown and Golden Sword, temporarily advancing to Ninth Rank, and being able to move flexibly... considered an opponent worthy of Its serious attention.
As for Ybur...
It's hard to say.
