Wilfred's attack had brought the cauldron's stability at its weakest, so the discharge of power of his companion's abilities caused far more damage than expected. Still, they would have been enough to ruin the inscriptions even without the hybrid's help.
Divine Demon's cylindrical formation released laws that were the direct opposite of those contained in the cauldron. Of course, his current cultivation level didn't allow him to consider the item as a whole during his attack. Even if his law was incredible, he had to limit the effects of his technique to a small spot.