Fire God's Kagutsuchi (炎神のカグツチ Enjin no Kagutsuchi) is a Fire God Slayer Magic Spell.
The user spreads their arms and legs and unleashes a giant ball of black flames around themselves. This spell was strong enough to counter and eventually overpower Natsu Dragneel's Fire Dragon's Brilliant Flame.
When you burn down the west...
and you burn down the east...
Fire God's Kagutsuchi! 
- "Kagutsuchi" is a fire god deity of Japan who burned his mother to death when she gave birth to him.
- Fairy Tail Manga: Chapter 218, Pages 3-5
- Fairy Tail Anime: Episode 105
|Zancrow's Spells||Fire God's Bellow • Fire God's Explosive Flame • Fire God's Kagutsuchi • Fire God's Scythe • Fire God's Supper|