Here's a comprehensive guide to defeating the Diabolic Variant in "Final Fantasy 7 Rebirth," including requirements, a detailed walkthrough, strategies, and additional tips:
Requirements:
Diabolic Variant Boss Guide in Final Fantasy 7 Rebirth
•Location: Nibelheim Reactor in Chapter 11.
•Party Composition: Cloud, Tifa, and Yuffie are the mandatory party members for this fight in Chapter 11, "The Long Shadow of Shinra."
Materia:
•Ice Materia: Diabolic Variant is weak to Ice.
•Healing Materia: Cure or Chakra for healing poison and regular damage.
•Poison Materia: Optional for countering the boss's poison attacks.
•Assess Materia: Useful for understanding the boss's mechanics.
Gear:
•Equip weapons that offer high magic stats or MP for Tifa and Yuffie to exploit the ice weakness.
•Armor with Poison Resistance or Elemental Materia linked with Ice for passive damage.
•Level: Aim for around level 30-35, but with good Materia and strategy, you might tackle it earlier.
Detailed Walkthrough: 
Phase 1:
Diabolic Variant Boss Guide in Final Fantasy 7 Rebirth
1.Initial Attack Pattern: Uses Tentacle Lash, Tentacle Drill, and Toxic Mire.
2.Strategy:
3.Start by focusing on the Right Arm to pressure the boss. Use Yuffie's Ice Ninjutsu or Tifa's Blizzard spells.
4.Avoid standing in front of the boss to dodge Toxic Mire, and keep moving to avoid Tentacle Drill.
Phase 2 (around 75% HP - Enshadow):
Diabolic Variant Boss Guide in Final Fantasy 7 Rebirth
1.Enshadow: The arena is filled with poisonous gas, and the boss can now clone itself.
2.Strategy:
3.Continue targeting the Right Arm to make the boss vulnerable; destroying it stops some attacks temporarily.
4.Use healing to manage poison damage, and concentrate attacks on one clone at a time since they have the same health as the original at the time of cloning.
Phase 3 (Post-Clone Phase):
Diabolic Variant Boss Guide in Final Fantasy 7 Rebirth
1.Cloning: Clones appear with the same health as the original at the time of creation, making the fight a cycle of arm destruction and clone management.
2.Strategy:
3.Keep up the pressure by destroying arms on clones as well.
4.Use Synergy Abilities like United Refocus to get extra ATB, allowing for more ice spells or healing.
Strategies: 
Diabolic Variant Boss Guide in Final Fantasy 7 Rebirth
•Exploit Ice Weakness: Use Ice spells, summon Shiva, or Yuffie's Ice Ninjutsu to deal maximum damage and pressure the boss.
•Arm Destruction: Destroying the Right Arm will pressure Diabolic Variant for a long period, enabling you to stagger it more easily.
•Poison Management: Use Chakra Materia or Poisona spells to heal from poison. Equip Poison Resistance if available.
•Synergy Abilities: Use these to refill ATB bars, heal, or deal significant damage when the boss is staggered or cloned.
Tips: 
Diabolic Variant Boss Guide in Final Fantasy 7 Rebirth
Character Roles:
•Cloud: Use him to manage both melee and ranged attacks, focusing on breaking the arms.
•Tifa: Great for stagger with her Unbridled Strength and Chi Trap, use her for high damage output on a pressured boss.
•Yuffie: Her ninjutsu and ability to stay at range make her perfect for dealing with the clones and using ice spells.
Other Tips:
•Positioning: Always keep moving to avoid area attacks and manage the poison gas. Use the arena's space to your advantage.
•MP Management: On Hard Mode, where MP items are restricted, use ATB for abilities and save MP for Ice spells and healing.
•Limit Breaks: Save these for when the boss is staggered or when dealing with multiple clones to clear them quickly.
•Summoning: If you have Shiva, summon her during staggers or when the boss uses Enshadow for maximum effect.
•Hard Mode Specific: Equip Ice-Elemental on weapons, focus on Right Arm to pressure, and avoid using MP excessively with Cloud due to upcoming fights.
