Chain of Eagle

 The Chain of Eagle are powerful magical chain that was created by the Hadrian People that is located in now a day Sorcerer Forest, Mondral where they created a chain that have enough magical power within it to last a long time and also having a flow system where magic from one place can go to another more easily where the Alvavian use to create the portal between the ground and the floating islands of Alvavia where it is still in use now a day even if magic is now more prevalent compare to the Imperial age even so most now a day people still don't have the ability of magic or far away magical teleportation that is needed to go to the Floating Islands of Alvavia essentially for large and heavy object that the city located in the Floating Islands of Alvavia need.

The Chain is created out of Steel and then was infuse with magic that was created by the Hadrian People who back in the day is one of the few group of people who hold far more magical knowledge that the Kastugarian and the Magusvian, the chain was constructed in the Great Plain afterward was transported to the Floating Islands where the head leader of the Hadrian People forge it and connect the Chain of Eagle and the Floating Islands of Alvavia together.

The reason that the Hadrian People made the Chain of Eagle for the Alvavian is unknown but some believe this is from a deal by the Magusvian, the Maple Colony and the Alvavian Colony back in the day to not invade the Sorcerer Forest and letting them have higher autonomy compare to the other taken territory by the Magusvian colony but the truth of that matter is still unknown or even lost due to the record about such stuff is rarely noted down back during the Imperial Age and even if it is it might have been destroy in a war or fighting like riot and such.