Key: Daquann1
Character: Wushei
Skill(or transformation): CHIDORI
How well do you know the source material?(obviously not relevant if it's a transformation): Well
Reasoning:
After being attacked with intent to kill on more than one occasion; Chla believed it would be wise to ensure each fighter is well equipped to handle each situation. Thus he offered to teach Wushei a special skill that he'd likely be able to utilize better than others who possess the hidden skill.

What is the moment:
After being asked to follow his leader; he came to find out they'd be doing some special training. Chla wanted Wushei to use his eyes and mimic the abyssal art. With his eyes playing a huge part in this process the goal is for Wushei to mimic the attack, and make it his own. In fact it's intended for him to use it far better and more skillfully than others.

Log:
https://pastebin.com/PTntYP4W