Fire Essence is an item in the game Blox Fruits that can be obtained by rolling the Death King NPCs Random Surprises. Its purpose is to be used to obtain the Dragon Talon Fighting Style. The Dragon Talon Fighting Style is one of the two requirements for the powerful fighting style Dragon Talon. Fire Essence cannot be obtained from the gravestone NPC.

To use Fire Essence, players need to go to the Honda and find the NPC by walking straight. Then, they need to roll for the Fire Essence. Fire Essence cannot be used for anything else besides obtaining the Dragon Talon Fighting Style.

In summary, players can use Fire Essence to obtain the Dragon Talon Fighting Style, which is one of the two requirements for the powerful fighting style Dragon Talon. Fire Essence can be obtained by rolling the Death King NPCs Random Surprises and cannot be used for anything else.