Although Qi Tian did not buy any elixirs, he had over five thousand middle-grade spirit stones that could be used for cultivation and to open up his meridians. Using spirit stones was considered extravagant, and not many could afford this luxury in the Imperial Master Mansion. Moreover, the efficiency of absorption is much lower than that of elixirs, leading to serious waste. However, Qi Tian did not mind this. As long as he could achieve a breakthrough sooner rather than later, waste was acceptable. More importantly, his cultivation was assisted by the Heavenly Dao Engine, which significantly reduced wastage. Even the Spirit Qi that could not be absorbed by him and was about to disperse into the surroundings would be swept away by the Heavenly Dao Engine, serving as its fuel.