It can be anything as long it's energy, the higher the grade the more the energy, from herbs, pills, food , dual cultivation, wait I can gain energy from dual cultivation, but isn't this too much, mortal grade only gives 0.1 energy I don't know about other grade but to buy mortal grade herb it cost 8 sliver and guess what I'm a pauper.
What the heck it takes ten thousand pounds just to create skin refining technique, nonsense I rather save money to go to the city and join a martial hall, it's just ten sliver, as for how to get them, every day I get 0.1 energy for free, and it takes 1 energy point to raise my arrow mastery to minor achievement, and another 1 energy to raise my hunting skill to minor mastery, so twenty days in total, if I look for herbs in the mountains every day and add that's from my meals I just need ten days in total so I can start hunting animals for money.
Finally I'm home, my whole body is in pain but before I could do anything my door was roughly knocked and kicked open,three men led by a burry man entered and I remember damm I borrowed one silver and I haven't paid yet .
The leader looked at me and said damm brat where is my money, I signed and look at my savings online one silver,he took it and said in seven days he will come to collect the interest and he smile cruelly and said one silver and left. I sat down cursing as now I had no money, it looks like I should take a risk and hunt , collecting herbs won't do it