Chapter 111 - 111: Do You Know What Happened to Ghidorah in the End?

Speaking of this thing called Kaenseki, it's actually classified as a prohibited item within Orario.

The reason is simple, its explosive power is far too destructive. Supposedly, aside from Ottar who is Level 7, among all Level 6 adventurers only the dwarven warrior Gareth can tank an explosion from it and still remain standing.

Because of this, back during the "Seven Days of Death" incident, the Evilus familia used this special material to create suicidal bomb troopers, killing a massive number of adventurers.

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