We expand on the world-building and integrate Aria's kingdom, **Eryndor**, into the broader timeline of *That Time I Got Reincarnated as a Slime*. We'll create new chapters that explore how Eryndor grows stronger as these major events unfold.
---
As Yuuki Kagurazaka rose to power, forming the **Freedom Association** and establishing himself as a key player in the world, Aria watched from afar. Her kingdom, **Eryndor**, had grown into a formidable force, but she knew that Yuuki's ambitions could pose a threat.
Athena, her Ultimate Skill, chimed in: *"Yuuki's 'World Domination' skill makes him a dangerous individual. His actions could destabilize the balance of power."*
Aria nodded, her crimson eyes narrowing. "We'll keep an eye on him. For now, let's focus on strengthening Eryndor."
---
When Yuuki formed the **Cerberus Underground Organization**, Aria's spies reported on their activities. The organization's involvement in summoning otherworlders and engaging in shady dealings raised concerns.
Aria called a meeting with her council. "Cerberus is a threat," she said. "We need to ensure they don't interfere with Eryndor's growth."
Lyria, the Chief Diplomat, suggested, "We could establish a network of informants to monitor their activities. Knowledge is power, after all."
Aria agreed. "Do it. And let's strengthen our borders. We can't afford to be caught off guard."
---
When Hinata Sakaguchi was summoned and mentored by Shizue Izawa, Aria took note of her potential. Hinata's rise to power within the **Western Saints Church** made her a key figure in the world's political landscape.
Athena advised: *"Hinata's strength and influence could be an asset or a threat. It would be wise to establish diplomatic relations with the Western Saints Church."*
Aria sent an envoy to the church, offering to establish trade and mutual defense agreements. While the church was initially wary of Eryndor's monster population, Hinata's pragmatism led to a tentative alliance.
---
The rampage of a summoned demon and the destruction of a small kingdom sent shockwaves through the world. Aria, recognizing the danger posed by uncontrolled summoning, took steps to protect Eryndor.
She ordered the construction of magical wards around the kingdom, designed to detect and repel summoned entities. Her spirits—Lunara, Ignis, and Gaia—worked tirelessly to strengthen these defenses.
Athena commented: *"The Eastern Empire's involvement in this incident could lead to greater conflicts. We must prepare for the possibility of war."*
Aria nodded. "Let's increase our military training and stockpile resources. We'll be ready for whatever comes."
---
The revelation of the hero's slumber beneath the **Holy Kingdom Ruberion** intrigued Aria. She sent emissaries to learn more about the hero and the Vampire Queen, **Ruminas Valentine**, who guarded the slumbering figure.
Athena analyzed the information: *"The hero's power could be a game-changer. If awakened, they could tip the balance of power in the world."*
Aria decided to keep a close eye on the situation. "For now, let's focus on our own strength. We can't rely on others to protect us."
---
Clayman's rise as a Demon Lord and his connection to the revived **Kazaream** added another layer of complexity to the world's political landscape. Aria, now recognized as a Demon Lord herself, knew that Clayman's ambitions could threaten Eryndor.
She called a meeting with her council. "Clayman is a puppet master. We need to be cautious. Let's strengthen our alliances and prepare for the possibility of conflict."
Tharn, the Head Military General, nodded. "We'll increase our patrols and fortify our defenses. If Clayman makes a move, we'll be ready."
---
As these events unfolded, Aria's power continued to grow. One day, while exploring an ancient ruin on the outskirts of Eryndor, she discovered a hidden chamber filled with relics of immense power. At the center of the chamber was a massive gate, its surface covered in intricate runes.
Athena's voice echoed in her mind: *"This is the Gate of Babylon, a legendary artifact said to contain the treasures of a forgotten civilization. If you can unlock its power, it could become an Ultimate Skill."*
Aria approached the gate, her hand hovering over the runes. As she touched them, a surge of energy coursed through her, unlocking the **Gates of Babylon** as an Ultimate Skill.
**[Ultimate Skill: Gates of Babylon Acquired.]**
The Gates of Babylon allowed Aria to summon an infinite arsenal of weapons, artifacts, and treasures from a pocket dimension. Each item was imbued with magical properties, making them devastating in battle.
Athena explained: *"The Gates of Babylon are not just a weapon—they are a symbol of your authority and power. Use them wisely."*
Aria smiled, her crimson eyes glowing with determination. "This will give us the edge we need."
---
With the Gates of Babylon at her disposal, Aria led Eryndor into a new era of prosperity. The kingdom's economy boomed, its military became even stronger, and its people thrived.
The council, now empowered with Unique Skills, worked tirelessly to ensure Eryndor's continued growth. The summoned demons, their abilities enhanced, became invaluable allies in both defense and diplomacy.
---
As the world around her grew more chaotic, Aria stood firm, her resolve unwavering. With her Ultimate Skills—**Athena, Goddess of Wisdom**, **Crimson Apotheosis**, and **Gates of Babylon**—she was ready to face whatever challenges lay ahead.
The rise of Eryndor was not just a story of survival.