Going back to the matter of the Demon Beasts in the swamp, it was believed that the further the twins' group went into the swamp, the stronger they would be. Now that they found a way around the repealing effect, they did indeed encounter stronger Swamp Demon Beasts more often as time passed.
However, that only continued until the Swamp Beasts reached the level of Elemental Space Realm Initial Stage. With the twins' group's many methods, they could fight against opponents who were an entire Realm above themselves. Let alone when they worked together. If anything, those Demon Beasts proved to be great opponents for training instead.
But after they encountered a few Swamp Demon Beasts at this level, the frequency they found more of them reduced the further they went. Forget about Swamp Demon Beasts at the Middle Stage Elemental Space Realm. It was hard to find Space Bending or even Void Tempering Realm Swamp Demon Beasts.
