With the Lightning Core reaching the baseline size that Lin Mu found to be stable, he decided to give it a rest.
'At least it reached this size before I ran out of materials.' Lin Mu thought to himself. 'Once we're out, I should stock up on as many elemental herbs and other materials I can. The low quality ones will be dirt cheap here anyways.' He reckoned.
There was still a long way before the Wind and Lightning cores would reach the Immortal level, thus Lin Mu still had a lot of leeway in using Spirit herbs and other lower quality mortal materials.
'Even for the Five Basal elemental cores, finding immortal materials for them at a decent cost won't be a problem.' If there was one thing Lin Mu had, it was money.
Plus, he had companions who could easily supply and source him whatever he needed.
'Perhaps I can make a list to be bought… Herbs and materials of all kinds as long as I've never used them.' Lin Mu thought and started making a list.
