Flame Transformation

Combustion (炎化) is an Intrinsic Skill, possessed by Ifrit, to transform a magical or spiritual corpus into flames.

Upon defeating Ifrit, Rimuru obtained this Skill. After some testing and initial difficulties in its application due to Magicule expenditure, Great Sage fused Combustion via Unique Skill Degenerate with Extra Skills Water Manipulation and Fire Manipulation, resulting in Extra Skills Black Flame and Molecular Manipulation.