As always, when a Legendary Tier skill is created, it's natural for the Angel Envoys to write down their experiences and insights, as well as the techniques for using it in actual combat.
That way, Mentor Fang can perfectly utilize the skill when borrowing it... no, can add the skill to his collection in its entirety.
Switching between different perspectives, Black Blade and the others had already started getting familiar with the Legendary skills, and he too borrowed them to familiarize himself for a while.
Starting with Black Blade's 'Immortal Legion'.
"The use and expression of this skill are similar to Black Blade's previous Legion Combat Method, but the similarity is only on the surface. The original Legion Combat Method would be hard-pressed to make significant breakthroughs, whereas the current Immortal Legion can improve indefinitely."
The Immortal Legion has three main features.
Housing Heroic Spirits, nurturing Heroic Spirits, and the Legion Formation!