Overkill on Strike Core?

[FadeOutAgain]

Hello! I love this core. My only issue is I have absolutely no idea how to use his overkill? Whenever I press it, even during battle and charging it up with melee attacks, it never triggers. Can someone please explain how to use this and also how to get it to work?

Thanks in advance!

[KaraPenguin]

You build marks, indicated by the circle in the center of the screen, by dashing through enemies. Once you dash through an enemy it will deal damage and will make one of the claw marks turn red. Upon getting three red marks you can use Overkill to execute three slow-motion dashes that apply a delayed attack to any enemy hit.

Stack the delayed attacks for huge damage to single targets or spread them out across multiple for wiping large groups. Takes a bit of getting used to but once you get the hang of it, it's pretty fun.

[FadeOutAgain]

Thank you, I appreciate it.