For Foundation Establishment level 10, which was the peak of the realm, it would take 3072 hours or 128 days. To spend the equivalent of 4 whole months cultivating nonstop was a daunting prospect, but given the time he had already spent coming here, Dalvin knew he had to get it done.
Once more, he hesitated greatly about his weird decision to abstain from using pills. He had initially taken that decision because cultivating through Qi Refinement was so quick that it seemed superfluous, but Foundation Establishment was beginning to take a long time.
Of course, the power it yielded him with each small realm breakthrough was extremely great, akin to some major realm breakthroughs for some. He was able to punch above his realm due to this fact, even defeating Core Formation equivalent disciples with ease.