Smiling in content at the progress of his dungeon, Simon closed his eyes and cleared all the residual thoughts in his mind.
He brought out ten mana crystals from his [Inventory] and spread them around him. Clenching one of it in his hands, he started utilising his [Mana Lines] skills and absorbed the highly rich and pure mystical energy from it.
A refreshing feeling spread through his body and reached every corner and cell. It did not harm him and instead benefitted him greatly and slowly assimilating with him becoming a portion of his strength.
The feeling was the same as when he defeated a monster and gained experience through it. Although it was mostly due to him being a game developer in his past life that he spoke in gaming terms, but there was no such thing as hunting monsters for experience in this world.
Creation is hard, cheer me up! Don't forget to Vote for the novel since it indicates the book's popularity.