Place this callout at the start of your attack sequence, after the Mangekyo Sharingan cue and before the WTF Boom impact, so the build, callout and explosion read as one continuous anime fight beat in your edit.
Über diesen Sound
This is a 3.5-second voice line of Madara Uchiha shouting Katon: Haijingakure no Jutsu in a sharp, commanding delivery. It feels tense and menacing, like a warning that a huge fire-style attack is about to hit. The line comes from Naruto, where it is used as a serious battle callout for the technique.