A: It depends on how you played the end battle in FFVII. He either did the Omnislash if you chose to do so, or he counterattacked with a regular sword attack if you let Seph make the first hit. Also, it went by a different name in the AC movie "Omnislash Version 5" and in Advent Children Complete, it was dubbed "Omnislash Version 6".

Q: What does the text say that is inscribed on the plaque that is on Jenova's head in the game of FFVII?