Hopefully you brought a solid ranged weapon for this battle. As can be expected from a legendary bird said to reincarnate through flames, the Phoenix has a hot and varied arsenal. It can shoot fireballs while it is on the ground.
The three-way vertical shock wave it fires is also quite powerful, but these are fairly easy to dodge.
When the Phoenix takes to the air, it becomes a tougher target to hit. It retains its fireball attacks as well as the ability to flap its wings to shoot another set of shock waves, and can even cast a stream of flame onto the battlefield. Watch out if the Phoenix begins to glow bright orange. That’s the cue that it will use its charging attack, flying low across the arena and causing heavy damage to Pit on contact. It’s possible to dodge it, but a safer bet is to use the jump pad at the center of the arena to leap over the attack.
The Phoenix does not shoot fireballs while on the ground. The Phoenix is always flying around the arena or hovering above it, except when it stomps on the ground to use its three-way vertical shock wave.
When the Phoenix is finally killed, Underworld Army forces attempt to steal the Wish Seed, only to have it blow up in their faces. Despite the Wish Seed being a fake, the beacon of the Phoenix’s demise, along with some “helpful” nudging from Hades, threatens to galvanize the human world into conflict. For now, Hades has won the first round.