บท 466: Chapter 461 : A Mystery Flame?

*Whoosh*

A black flame appeared in Sato's furnace, swallowing up the previous orange-red flame while giving off an absurdly hot temperature.

'Success.' Sato's eyes shone as he held the hilt of a blue-coloured sword.

Right after the vice-president of the Blacksmith guild, Kolin had stated that a mystery flame was a part of a blacksmith's skills, freeing Handel from the accusations of the public while also giving him an advantage in the contest, Sato had thought of an idea. 

By basic definition, a mystery was a flame that had surpassed the level of a regular flame, gaining special attributes and much higher intensity and temperature than normal flames. So technically, certain special flames in existence can be classified as a mystery flame, for example, the black flames of the cursed sword [Drakken].