A very powerful Solo Numbering Skill. Rank 1
The strongest skill known to humanity. It is a skill which Kim Kangtae, the strongest human, uses. Kangtae trusted this skill to constantly heal him and fought like a mad warrior in the front for as long as he didn't die.
This skill is famous on its own but was made to be considered the Number 1 skill known to humanity due to Kim Kangtae's exploits.
Immortal Soul turns the user's body close to an immortal's. It allows one to fight like a "Mad Immortal" in the battlefield with no worry about injuries or stamina due to the extreme regeneration granted by the skill.