Gyro Core: Inert [Hands]  

 

Buy the inert core from Automated Vernding Unit V in Dragonscale hills, then but the regearing kit and class pattern (Martialism Core Gear Kit for instance) from Automated Vending Unit II. The container is 3 slot put all three in and combine you will get the class core for the slow the essense was for which you can then combine in the uncored armor.