Ikariyus, also known as Icarius, was the capital city of the Temporal Empire in the first era of Abmarah. The city was known as the greatest city on the planet during its existence, and was possibly the largest and most populated city of the First Era only rivaled by Jamre. The city was destroyed after the Omniborn Crisis when the comet Zaenak's Light directly impacted the city, making it the ground zero of the apocalypse and the center of the now Cometfall Sea.

"Do you know of Ikariyus? It was the greatest city I've ever seen. My home. It did not have the gothic towers of Sergorod, nor did it have the skyscrapers of Sombus. Instead, we had glorious arches, columns, monuments... The city was green with life. Not the lifeless stone cities of the Dwarves, nor the forests of the Elves- No, a mix of both. Beautiful marble plazas lined with trees, the architecture intricate with its carvings and beautification. We had towering amphitheaters and basilicas... Tall buildings that incorporated aqueducts creating cascading waterfalls and green terraces across the city. Many of these felt like canals and rivers above the streets, waterways more advanced than anything today. My own villa had six stories, an indoor garden, a rooftop bath... I had an atrium with a glass roof, and arcane constructs serving my every need.

Above the city hanged floating buildings and skyports, airships and starships flying above us the entire day. The largest of the floating structures were the three Red Towers, floating fortresses that housed the best military tacticians in the world. And in the center of the city, the Khazkaeni. A colossal palace, the ziggurat rose higher than all the buildings around it. It had the largest garden in the known world, nurtured by Deltos himself. It housed the grandest collection of knowledge within its halls, and it was the center of culture in Abmarah. The city's streets radiated out in a circular pattern around the palace, and the Khazkaeni's tower could be spotted from hundreds of miles away. Ikariyus was beautiful... And not a trace of its magnificence remains any more. The comet hit the city at the end of the war... And all that remains is the Cometfall Sea. I have no luxury of walking through ruins or visiting my homeland... All I have anymore is memories and paintings."
—Kol-Han about his homeland.

Areas of the city included:

Khazkaeni. The Palace of Khaz Draxal and Khaz Zaenak, it was a large ziggurat with a tower at the top that reached into the skies. It had great hanging gardens as well as an extensive library, and was often known as a wonder of the ancient world.

The Red Towers. Colossal floating towers hanging in the sky above the city, they were ports for airships and starships as well as the military headquarters of the Temporal Empire. They were often known as a wonder of the ancient world alongisde the Khazkaeni.