19 : Black Flash -

(two and a half) times the power of a normal hit, making it a critical, high-damage technique.

You can often "chain" Black Flashes. After one lands, immediately re-engage with heavy attacks, as you may have a short window where another one is easier to pull off. 19 : Black Flash

Some characters (like Yuji or Mahito) require you to be in a specific state—often activated by building up damage—before the Black Flash can occur. (two and a half) times the power of