Gravestone Blox Fruits: prayer and full moon

The Gravestone is a Misc NPC located at Haunted Castle, in Third Sea. You can only use it at night and it lets you choose between trying your luck or praying - never both in the same night. At stake: Bones, free EXP, an ambush of Ghosts, or a jackpot of around 1%. During a full moon, the prayer option also opens the puzzle leading to the Skull Guitar.

How to get it

It is located at Haunted Castle, in Third Sea. Interact with it at night only.

How It Works

When you activate it, it displays "You see a gravestone." and offers you two options: Try luck or Pray.

The Gravestone, with its Try luck and Pray options

You cannot pray and try your luck in the same night: it's one or the other.
A 15-minute cooldown applies. If you click too soon, it responds "Nothing happened, maybe you should come back later?" and the conversation stops.
If the dialogue displays "You Prayed", it means you died during the Skull Guitar puzzle: you won't be able to redo it.

Rewards

Option	What You Can Get
Try luck	20 Bones, with the message "You find some bones."
Try luck	1 to 5 Ghosts of Lv. 1500 that ambush you, with an "Uh-oh!". They use Flash Step
Pray	Nothing at all, around 50%, with "You finished praying."
Pray	Free EXP, around two levels and sometimes four, around 49%, with "You have been blessed with free experience. Lucky!"
Pray	The jackpot, around 1%: God's Chalice, Hallow Essence, 100,000 Beli, 1,000 Fragments and the title The Devil's Luck, announced with a "What just happened?"

An honest caveat about this table: the Fandom version uses merged cells that make the reading ambiguous, and depending on interpretation the EXP reward can shift to the Try luck side. The percentages given (50 plus 49 plus 1) only add up on the Pray side, so that's the interpretation used here.

Full Moon: The Skull Guitar Puzzle

If you choose Pray during a Full Moon and you are Lv. 2300 or higher, the Gravestone may offer you a game. Completing it unlocks access to the Weird Machine, the merchant who sells the Skull Guitar.

The lines you will see:

"Oh. You're too weak. Nevermind. Come back when you're stronger." if you don't have the required level.
"Your prayers have been answered." then "Would you like to play a game?" and finally "Very well." to start the puzzle.

Once the puzzle is completed, the Pray option behaves again like a normal night, full moon or not.

Good to Know

If you use Portal's or Dough's M1 at the moment you click on an option, it returns "Error: Try again."
The Gravestone arrived with Update 16.

Update history

NPC : Gravestone·Released : Update 16

Update 30 3 octobre 2026 Adjustment
- Dough's M1 also triggers the "Error: Try again." message when clicking an option (added by a player on the source page, 3 October 2026).
See update 30
Update 16 vers fin 2021 Release
- Added to the game.
See update 16