Back inside the Main Floor, Simon took a deep dive inside the Pond of Serenity. Just like every other aspect of the dungeon, the Pond of Serenity had also shown growth far greater than before.
Now not only did it occupy a large portion of the land of the Main Floor about 3% but it was now very deep and concentrated. What's more, the ones listed are just the physical change.
The pond of serenity's value didn't come from its highly pure mystical water or its large size but due to the extreme numbers of Heart Veins that ran underneath it.
Heart Veins are higher grades of Mystical Veins that run across the planet and deposit the energy that nurtures all life. After dungeon Laplace rose to [B] tier, the numerous mystical veins running through the Main floor and especially the Pond of Serenity evolved to become Heart Veins.