from what I understand about adv coc, black lightening leak from the attacking source before the attack and not as shockwave
Look man. Ill explain it like this.
Colour of armament
Tier 1 base form, Gives skin or weapons a black hue
Tier 2 barrier form. Is invisible aside from black skin/weapon hue but creates a flow around objects
Tier 3 internal destruction. Is invisible aside from black skin/weapon hue but flows from user into target.
Colour of conquerors probably works exceedingly similar
Tier 1 base form, environmental damage in strong users, can inflict willpower onto others either scaring them or concussing them, is invisible
Tier 2 barrier form, creates a barrier of willpower around objects but has a visual cue to coincide (zoros ashura)
Tier 3 internal destruction form. CoC flows from user to target, also a visual cue (black lightning charge up and burst on contact)
Even colour of observation has tiers