File:Special Duration Up Vulnerability Chart.png

Formula
B = % Change = (0.99 &times; A &minus; (0.09 &times; A)2 ) / 30

Killer Wail normally leaves the player vulnerable for 120 frames, and Inkstrike for 100 frames as of 2.7.0. 60 of these frames are affected by Special Duration Up.

C = Killer Wail Vulnerability Time (frames) = 60 + 60 &times; (1 &minus; B)

D = Inkstrike Vulnerability Time (frames) = 40 + 60 &times; (1 &minus; B)

Killer Wail Vulnerability Time (seconds) = C / 60

Inkstrike Vulnerability Time (seconds) = D / 60