The Temple of Eternity was a myth, a relic from the dawn of time. Even the oldest Celestials barely spoke of it, for it was said to be a place that housed untold power—an energy that predated the Celestials themselves.

As Teri, Kei, and Ignis landed before the massive doors of the temple, they could feel the ancient magic radiating from within. The doors, engraved with celestial symbols and runes, were slowly creaking open.

"We should proceed with caution," Teri warned, his tone serious. "Whatever lies inside... it's powerful."

Ignis, always eager for a challenge, ignited her fists. "Let's see what's in there. If it's trouble, we'll take care of it."

Kei hovered beside them, her wings fluttering nervously. "I don't like this. The energy here feels... wrong. Like it's not meant for us."

But Teri pressed forward. "We can't ignore it. This temple was sealed for a reason, and we need to find out why it's opening now."

The three Celestials entered the temple, their footsteps echoing in the vast, shadowed halls. Inside, the air was thick with ancient energy, and the walls were lined with statues of forgotten deities and celestial beings. At the center of the temple, a massive stone altar stood, pulsing with a faint, otherworldly light.

On the altar lay an artifact—a crystal, swirling with dark and light energy, as if the forces of creation and destruction were locked in eternal conflict.

Kei stepped forward cautiously. "That's... the Heart of Eternity," she whispered, her eyes wide with recognition. "I've only ever heard about it in legends. It's said to control the flow of time and space across all realities."

Teri narrowed his eyes. "If this is what Chronos was after, we're in deeper trouble than we thought."

Suddenly, the crystal pulsed, and the ground beneath them shook violently. From the shadows, a figure emerged—a guardian of the temple, its body composed of shimmering energy, its eyes glowing with ancient wisdom and power.

"You are not meant to be here," the guardian said, its voice echoing through the chamber. "The Heart of Eternity is not for your kind."

Ignis stepped forward, ready to fight. "We're not here to take it. We just want answers."

The guardian regarded them with a cold, calculating gaze. "This power was sealed away by the first Celestials. It is beyond your comprehension, beyond your control. If it is unleashed, the multiverse will fall."

Teri's hand instinctively moved toward his sword. "We're trying to protect the multiverse. Who or what could have awakened this power?"

The guardian was silent for a moment, as if weighing the truth in Teri's words. Then, slowly, it spoke again. "There are forces older than the Celestials. Forces that seek to undo the very fabric of creation. Chronos was but a pawn—an emissary of a greater darkness."

Kei's heart sank. "The rifts... the disturbances... they were all leading to this, weren't they?"

The guardian nodded. "Yes. And now that the Heart of Eternity has been disturbed, those forces are watching. Waiting."

Teri stepped forward, his resolve clear. "We need to stop them. Whatever it takes."

The guardian stared at him for a long moment before speaking. "Then you must take the Heart... and protect it with your lives. But know this—if you fail, the entire multiverse will collapse into nothingness."