The Inferno Fork is a magic weapon that drops inside the Dungeon from the Diabolist, a Hard Mode monster that can be fought in the dungeon after Plantera has been defeated. It fires an exploding projectile that leaves a lasting explosion on screen. The inferno left by it does not last as long as the Diabolist's, and it only runs for around 2-3 seconds. It does constant damage to enemies.
The Inferno Fork does very high damage to bosses when they are stationary. In combination with the Golden Shower, or other weapons inflicting Ichor, it can deal large amounts of damage.
Like most spells, the best prefix for this weapon is Mythical.
If used correctly, the Destroyer can be defeated in mere seconds with this weapon.