Strength was the only guarantee that he would be able to return to the immortal Dark Medical Sect one day.

Thinking of this, Xiao Yi couldn't help but think of the two low-quality Spiritual Stones that he got from Feng Laodao in his Micro World.

Those kinds of spiritual stones were made by the Spiritual Energy on the earth in ancient times by chance after being refined by a special crust, and the spiritual force contained in them was beyond the imagination of ordinary people. For cultivation, it was possible to achieve twice the result with half the effort.