Zhang Yi can also strengthen his cultivation in body refinement, he also reached the supreme layer of the seventh realm of body refinement, so his body was getting stronger and stronger.
If qi cultivation also got stronger in those months and reached the advanced layer of the spiritual sea realm, he could feel his strength and his qi getting stronger, he felt that perhaps with his present strength he could reach the end of this world with his current strength.
But he would risk no more, he wanted to get to the realm of mortal tribulation before ending this underworld, the only thing he feared was the celestial tribulation he would face when he left, it would be 3 tribulations in a row, hard to imagine him surviving.