This is a guide to beating the Boss Sephiroth in the game Final Fantasy VII Rebirth (FF7R). This article explains Sephiroth’s attack patterns, weaknesses, and tips and strategies for defeating him on both Normal and Hard Mode.
How to Beat Sephiroth in Final Fantasy VII Rebirth (FF7R)

Don’t Use an Elemental Materia
Sephiroth has a Lesser Resistance to all four elements – Fire, Ice, Lightning, and Wind. If you have an Elemental Materia equipped to Cloud’s sword, all your attacks will have Reduced damage This becomes even more dangerous in phase 3 when he will start to absorb a random element. Instead of Elemental, use the extra slot for something like Steadfast Block which will help you weather Sephiroth’s attacks.
Fill his Focus Gauge
Although he does not take much damage from attacks, Sephiroth’s Focus Gauge fills more quickly than other bosses. When you see his Focus Gauge rising, continue hammering hard with attacks to max out his Focus Gauge and stagger him, then follow through with a Limit Break or powerful Ability.
Use Counterstance Liberally
Particularly in Phase 1 of the battle, in which Cloud goes toe-to-toe and sword-to-sword with Sephiroth, you’ll want to take advantage of Twin Stinger’s Counterstance Ability. Unlike Punisher Mode’s auto-counter, Counterstance is able to counterattack even against offensive Magic, so you’ll be able to use it to hit back against Sephiroth regardless of what he uses against you.

Use Support Magic on Cloud
As Sephiroth has a Lesser Resistance to Magic for most of the fight, casting offensive Magic against him won’t always be the best way to take him down. You’re better off buffing Cloud with bonuses like Barrier and Manaward to protect from both Physical and Magic attacks, as well as Haste, to ensure he can use Counterstance as much as possible.