C1121 The Ice Mountain on the Sea
"Carbuncle."
Chu Yan recognized the material immediately—it was essential for puppet refinement, as described on the stone wall overhead.
Carbuncles are hundreds of times harder than steel. Striking steel plates with a carbuncle is akin to tapping an egg with an iron rod.
The purpose of the carbuncle is to form the puppet's framework.
Chu Yan extended a finger and flicked the carbuncle