Fireproof Technique (Japanese: 耐火の術, Kanji translation: Fireproof Technique Romaji: taika no jutsu) is a defensive fire shamanistic spell originally created by Naga the Serpent[1]. This is not the actual name of the incantation, merely its function, as its Power Words are unknown.
In a similar fashion as Flare Seal, the spell provides complete protection from fire and flames, being natural or magical in nature. But in contrast, this spell's incantation is shorter and so it's easier to use in a confrontation.