After the defeat and death of Calypsa, Pan transported Talia and the Argonauts away from the volcano and near the shore of Mount Etna. As they did, the young Heroes were confused. 

Bakugo: What the fuck happened?! 

As Bakugo said that, another loud and thunderous roar echoed through the island. With the Sight of Hermes, Jiro saw a large power source building up in the volcano. 

Jiro: Guys! Something big is building up in the volcano! 

Before anyone could react, the volcano of Mount Etna erupted. Instead of lava, a monstrous serpentine giant emerged from the volcano. As the monster emerged from the volcano, everyone was in a state of shock.

Midoriya: What is that thing?! Is that Calypsa?!

Pan: I'm afraid it much worse than Calypsa, young Midoriya. What we are dealing with is the monster Typhon!

Talia: Typhon?! You mean the monster Zeus defeated during the Clash of the Gods?

Pan: The very same. It seems Calypsa found a way to awaken Typhon and release it from Tartarus!

Typhon soon cast it's eyes on Pan and the Argonauts. As it did, Typhon lets  out a powerful roar which nearly overwhelmed everyone.

Kirishima: Whoa! That thing is big!

Bakugo: No fucking shit, Shitty Hair! How the fuck do we kill this fucking thing!

Pan: We will have to give it everything we have! We cannot allow Typhon to leave and make it's way to Greece! Countless lives will be lost!

In that moment, everyone realized what was at stake. There was no telling what damage Typhon would do if it was allowed to roam. They all knew what had to be done.

Talia: All right Pan! What would you have us do!

Pan: We will need to make a stand! Yaoyorozu! Your Creation Quirk should give us some firepower to use to push Typhon back! Summon whatever you can!

Yaoyorozu: Understood!

Pan: Jiro and Kirishima! You two will assist Yaoyorozu! Now quickly!

Kirishima: We got this!

Jiro: We won't mess up!

Yaoyorozu then used her Creation Quirk to create a large cannon. Kirishima and Jiro helped in manning the cannon and firing on Typhon.

Pan: Midoriya! You and Bakugo will take the fight to Typhon! Be careful!

Midoriya: We'll do our best!

Bakugo: Just stay the fuck out of my way, Deku! I'm about to fucking kill that overgrown lizard!

Bakugo then began assaulting Typhon with his Explosion Quirk while Midoriya activated One For All: Full Cowl to assist Bakugo. Pan then turned to Talia. 

Pan: Talia. You and I will use our magic to try and banish Typhon back to Tartarus! 

Talia: Right!

Pan's plan to defeat Typhon was set in motion. After what seemed like hours, Typhon showed no signs of weakness. Typhon then slams it's fists onto the ground. The shockwave incapacitated the Argonauts with the exception of Pan and Talia. Pan then started down the great beast. 

Pan: I AM TH SERVANT TO THE SUN GOD APOLLO! BY THE WILL OF THE GODS OF OLYMPUS, I CANNOT ALLOW YOU TO PASS!

Pan then unleashes a powerful magic attack on Typhon, which does little damage. Pan then looks to the sky. 

Pan: OH MIGHTY ZEUS! LEND ME YOUR LIGHTNING SO THAT I MAY BANISH TYPHON TO THE DEPTHS OF TARTARUS!

As Pan said that, a powerful storm soon fell on Mount Etna. Pan raised his staff and a streak of lightning strikes it. Pan then aims his free hand at Typhon and unleashes a torrent of lightning. Typhon howls in pain as he attempts to fight back. Pan's power soon begins to waver as the effects of the battle took it's toll on the Satyr.

Pan: (No....not now! I cannot fail now!)

Talia then places her hand on Pan's staff and the lightning begins flowing through her. She aims her free hand towards Typhon. Both soon unleash powerful torrents of lightning onto Typhon. The beast lets out a powerful roar as the lightning surged within it's body. 

Pan: GO BACK FROM WHENCE YOU CAME! YOU SHALL TORMENT THIS WORLD NO LONGER!

Soon, Pan and Talia were able to banish Typhon back inside the volcano of Mount Etna, effectively ending it's threat. After than, Pan collapsed on his knees.

Talia: Pan! Are you okay?!

Pan: I'll....I'll be fine. I....I used far too much power.....

As Pan took a moment to catch his breath, the Argonauts regained consciousness. 

Kirishima: My head....

Midoriya: Did we....did we do it?

Pan: We did, young Midoriya. Typhon has been banished back to Tartarus. Typhon will no longer terrorize this world. 

The Argonauts breathed a sigh of relief. The storm clouds soon vanished as the battle ended. Pan looked to the sky and smiled. 

Pan: It seemed the Gods have favored us this day. You all have done well. As your mentor and teacher, I am very proud of you all. 

In that moment, the Argonauts smiled upon their teacher. Pan truly felt pride in his students. 

Midoriya: So what now?

Pan: Now we head home. I believe we've had our fill of adventure here.

Talia: You're leaving so soon Pan?

Pan: Not quite. I would invite you to come with us. I think you would make a rather remarkable student at UA! 

Upon hearing this, Talia was at a loss for words. 

Talia: Are...are you serious?

Midoriya: I think you would do great at UA!

Kirishima: I agree! You'd make an awesome Hero!

As the other Argonauts encouraged Talia, she quickly came to an answer. 

Talia: Very well Pan. I accept your offer. 

Pan: Splendid, dear Talia! Now let us be off! We have another adventure waiting for us!

Pan then teleports Talia and the Argonauts away from Greece and back to UA. With Calypsa and Typhon defeated, peace had returned to Greece, in no small effort to Pan and the Argonauts.