"Oh yeah, this should be the first realm of Body Hardening System - Iron Body"
Aside from Energy Systems like Innate Energy System or Innate Energy System, there is also another way to make yourself stronger, and that is Body Hardening System.
The point of the Body Hardening System is to harm your body as much as possible in order to strengthen it.
The realms of the Body Hardening System are Iron Body, Copper Body, Bronze Body, Silver Body, Gold Body, Platinum Body, and Diamond Body. Every realm is divided into three levels: low level, middle level, and high level.
Those are all body realms known to the previous body owner, there are probably more though.
"So, I'm right now Half-Blood Connecting Realm in Innate Energy System and low-level Iron Body in Body Hardening."
"If everything goes accord to plan, I will train 4 systems, and that means 4 times more resources. I need to find a way to get resources or I will be unable to keep train all four systems."
"So, should I join a guild or something?"
But quickly after that, Nicolas dismisses all his thoughts. If he wants to join the guild he needs to have the power to do so.
"Okay now that I crossed the boundary called Body Connecting Realm, I should start to train
Basic Innate Arts." Said Nicolas as he rose from his meditating position up.
'Okay, let's start!'
Thought Nicolas while triggering Innate Energy in his left arm
Nicolas was trying to train Amplify-Strength.
Amplify-Strength worked on the principle that you need to need to make Innate Energy chaotic in the body part you want to strengthen, in other words, you need to 'trigger' Innate Energy in the body part you want to strengthen.
But 2 seconds later, Nicolas howled in pain.
"Arrgghh"
"I'm still not adapted to my enormous reservoir of Innate Energy." Said Nicolas as he looked at his arm. His whole arm was red.
Nicolas wanted to strengthen his arm but, he accidentally added more Innate Energy than he could bear, and as a result, his arm muscles nearly exploded.
Even though harming his arm muscles didn't hurt as much as connecting his body with his Innate power, he expected the pain from entering Body Connecting Realm, but as an expert of controlling Innate Power, he never expected to make an error such as adding too much Innate Energy, and that's why he had pain from something that didn't hurt as much as entering Body Connecting Realm.
7 hours later.
Nicolas walked toward his bed and took Innate Stone that has no more uses to him.
He held the Innate Stone with his right hand and he squeezed it.
After 2 seconds of concentrating, he said.
"Amplify-Strength right hand!"
All muscles in his right hand suddenly strengthened up which allowed him to crush the stone in his hand into the powder without any blockades.
.
Before mastering Amplify-Strength, it would be impossible to crush Innate Stone into a powder even if he entered the peak-level Iron Body, he would only be able to do so with low-level Copper Body according to memories of the previous body owner.
Nicolas looked down at the powder in his eyes and said with a delightful voice.
"Finally, after seven hours, I mastered Amplify-Strength."
"There are only two left now!"