Here's a comprehensive guide for defeating Abzu in "Final Fantasy 7 Rebirth," covering requirements, a detailed walkthrough, strategies, and additional tips:
Requirements:
Abzu Boss Guide in Final Fantasy 7 Rebirth
•Location: Fought in the Musclehead Colosseum at the Gold Saucer during Chapter 12.
•Party Composition: Cloud, Tifa, and Aerith are your party for this fight in Chapter 12, "A Golden Key."
Materia:
•Fire Materia: Abzu is weak to Fire, so this is crucial.
•Healing Materia: Cure or Pray for Aerith to keep the party healed.
•Barrier Materia: To reduce damage from Abzu's powerful attacks.
•Assess Materia: To understand Abzu's attack patterns and weaknesses.
Gear:
•Equip weapons like the Hardedge for Cloud for high damage output, and Mythril Rod for Aerith to maximize magic.
•Consider gear with Fire resistance to mitigate some of Abzu's fire-based attacks when he's enraged.
•Level: Aim for around level 40-45 for a smoother fight, but with the right strategy, you can manage at lower levels.
Detailed Walkthrough: 
Phase 1: Initial Attacks:
Abzu Boss Guide in Final Fantasy 7 Rebirth
1.Flail, Ground Pound, Charge, Bash and Smash, Pounce
2.Strategy:
3.Use Fire spells to pressure and stagger Abzu. Tifa can use her abilities to build stagger quickly.
4.Dodge or block Charge; the timing for dodging is just before Abzu reaches you.
5.Counter Pounce by dodging when Abzu leaps; this pressures him.
6.Aerith should keep the party healed, using Barrier when possible.
Phase 2 (Around 50% HP - Enrage):
Abzu Boss Guide in Final Fantasy 7 Rebirth
1.Enrage: Abzu becomes more aggressive, gaining new attacks like Ferocious Charge and Upheaval.
2.Strategy:
3.Keep up the Fire attacks to pressure him even when he's enraged.
4.Ferocious Charge requires multiple dodges due to its speed; keep moving to avoid it.
5.Upheaval is telegraphed by Abzu raising his fists; get airborne or move to the back of the arena to avoid the shockwave.
Phase 3 (Frenzy at low HP):
Abzu Boss Guide in Final Fantasy 7 Rebirth
1.Frenzy: Abzu's attacks speed up and become more chaotic with moves like Belly Flop.
2.Strategy:
3.Continue using Fire to pressure; at this stage, Abzu will dodge Fire less effectively.
4.Use Limit Breaks and Synergy Abilities when he's staggered or when he uses Frenzy for maximum damage.
5.Stay alert for Belly Flop, dodging when Abzu jumps up.
Strategies: 
Abzu Boss Guide in Final Fantasy 7 Rebirth
•Exploit Fire Weakness: Constant use of Fire spells, summon Ifrit if possible, and use abilities like Firebolt Blade.
•Stagger and Pressure: Pressure by dodging Pounce, hitting with Fire, or making him crash into walls during Ferocious Charge.
•Defensive Play: Use Barrier or Protect to reduce damage from Abzu's heavy-hitting attacks.
•Synergy Abilities: Use these when Abzu is staggered or to gain an advantage in ATB for more Fire spells.
Tips: 
Abzu Boss Guide in Final Fantasy 7 Rebirth
•ATB Management: Use ATB for Fire spells or abilities that can stagger or pressure Abzu.
•MP Management: Equip MP Absorption with Fire to sustain your spell casting, especially on Hard Mode.
•Positioning: Always keep moving to avoid area attacks like Upheaval or large melee swings.
•Limit Breaks: Save these for when Abzu is staggered or during Frenzy for the best effect.
•Hard Mode: Focus on MP efficiency, use items sparingly, and consider Fire Materia with Elemental in your weapon.
•Summoning: If you have Ifrit, summon him during Frenzy or when Abzu is staggered to deal massive damage.
•Tifa's Role: She's key for building stagger; use her Unbridled Strength for high damage output.
