Traitor... You will pay.Sephiroth using Octaslash
Sephiroth is a boss in Crisis Core -Final Fantasy VII- fought twice in the Nibel Reactor. Virtual versions can later be challenged in two missions, as well as Professor Hojo's final experiment labeled Experiment No. 124.
Sephiroth summons four elemental crystals: the Fire Materia, the Blizzard Materia, the Thunder Materia, and the Support Materia. The crystals have plentiful health and are immune to the elements that compose them, the Support Materia resisting elemental spells only slightly. The crystals resist physical attacks but are vulnerable to spells of their opposite element. The elemental Materia cast spells based on their element up to -ga level, while the Support Materia heals Sephiroth and can use Barrier to halve physical damage and Dispel to remove any buffs Zack places on himself. The crystals act and move independently of Sephiroth. If Zack is close enough, the Materia can exude magical energy to deal damage. The Materia can be interrupted from casting a spell by hitting them just after the ability they were about to use has been revealed.
Sephiroth often teleports around and it is hard to catch him from behind as he simply turns. Sephiroth will wait for the player to attack before swiftly landing either a 2-hit or 4-hit combo. He can use the Digital Mind Wave (DMW) attack, Octaslash, and his classic Heartless Angel attack, which knocks Zack's HP down to 1. He also uses Draw Slash to create a wide slash of energy.
Zack stands on a long platform and can only attack Sephiroth from the front. Sephiroth's attacks knock Zack back further. The battle is lost if Zack is pushed off the platform. Sephiroth is easier this time and does not summon the four crystals.