Grind

"From the looks of it, there isn't anywhere to get the armour that Kostas was equipped with. If it were only him who had it, it wouldn't be a problem. However, one of his clones also had it. It most likely isn't actual armour. They are probably flames which have been concentrated and modified to resemble armour. That would explain why Kostas appeared inside the armour as if he was summoned. Instead all he would've done was come out of his shell like a turtle," said Yuki. 

"Activate ability: Fire Control"