With the revelations of the Tree of Memories and the knowledge of their world's cosmic connection fresh in their minds, The Survivors embarked on the next phase of their journey. The anticipation of their final confrontation with the overlords weighed heavily on their hearts, and they knew that the challenges ahead would test their resolve like never before.

Their path led them to the heart of a sprawling city, a place where the influence of the overlords was most palpable. The city's streets were lined with imposing buildings, and its inhabitants moved with an air of resignation, the weight of oppression visible in their eyes.

Ealdred, the leader of The Survivors, spoke with determination. "This is where the overlords have their stronghold—the epicenter of their power. We must gather information, seek allies among the oppressed, and prepare for the final confrontation."

Lirael, with her archer's intuition, scanned the city for signs of dissent. "There are whispers of rebellion among the people, but they live in fear. We must find a way to inspire hope and unity."

Thoren, the stalwart warrior, watched the city's guards with a trained eye. "The overlords have a formidable army, but we have the artifacts and the knowledge of the cosmic forces. We must use our advantages wisely."

Selene, the healer with boundless empathy, reached out to the downtrodden inhabitants, offering solace and support. "The people need to know that they are not alone, that there are those who will stand against the tyranny of the overlords."

Corin, the master mage, studied the city's arcane barriers and defenses. "The overlords have harnessed cosmic energies for their own purposes. We must find a way to disrupt their control and weaken their grip on the city."

As they delved deeper into the city, they encountered resistance from the overlords' enforcers—mages wielding cosmic magic and soldiers clad in armor infused with celestial energy. The battles were fierce, but The Survivors used their artifacts and cosmic knowledge to overcome their adversaries.

In the midst of the conflict, they discovered a secret underground network—a group of rebels who had long yearned for liberation. The rebels, inspired by The Survivors' presence, shared information about the overlords' stronghold and their plans for domination.

Ealdred, with his leadership skills, forged an alliance with the rebels, their shared goal of overthrowing the overlords uniting them in purpose. "Together, we will confront the overlords and restore balance to our world."

Lirael, her archery skills unparalleled, trained the rebels in guerrilla tactics and marksmanship, honing their abilities for the battles that lay ahead. "We will use the element of surprise to our advantage, striking when they least expect it."

Thoren, the protector of The Survivors, stood alongside the rebels as a symbol of strength and resilience. "We will face adversity with unwavering determination, for the fate of our world depends on it."

Selene, with her gift of empathy, healed the wounded and lifted the spirits of the downtrodden, reminding them of the hope that had been ignited. "Our unity is our greatest strength, and together, we will overcome the darkness that has gripped our city."

Corin, the master mage, delved into the mysteries of cosmic magic, seeking to unravel the overlords' enchantments and weaken their control. "We will disrupt their cosmic barriers and expose their vulnerabilities."

As they prepared for the final confrontation, the anticipation of what lay ahead weighed heavily on their hearts. The overlords' stronghold loomed on the horizon, a fortress of celestial power that had brought suffering to their world.

But The Survivors were not alone in their quest. They had allies among the oppressed, the artifacts of cosmic knowledge, and the guidance of the sentient Celestial Key. Their journey had brought them to the precipice of destiny, and the moment of reckoning was at hand.

As they stood on the threshold of the overlords' stronghold, the anticipation of their final battle filled the air. The fate of their world hung in the balance, and the echoes of the past had paved the way for this moment.

The confrontation approached, and The Survivors were ready to face their ultimate challenge—to confront the overlords, unveil the cosmic truths that awaited them, and restore the balance of the universe.