Upgrading - Blox Fruits: upgrade your weapons

Upgrading allows you to improve your swords and guns to increase their damage. Upgrades are done with the Blacksmith in exchange for materials, and each weapon can only be upgraded once. It's also a required step - a weapon must be upgraded before it can be enchanted.

How to get it

Bring the required materials to the Blacksmith - each weapon has its own upgrade recipe.

How it works

Added in Update 17.3, the system only applies to swords and guns.
Bring the required materials to the Blacksmith NPC - he upgrades the weapon and increases its damage.
One upgrade per weapon only, no multiple levels.
Upgrading is required to enchant a weapon (see Enchantments).

Where to find the Blacksmith

The Blacksmith is located in all three seas:

Upgrade recipes

Each weapon has its own material recipe - the details are shown on the page for each sword and gun.
General rule: the higher a weapon's rarity, the more materials its recipe requires, and the harder those materials are to obtain.
The vast majority of recipes require only two types of materials; those requiring three mainly concern Legendary weapons and beyond.
Completionist trap: to upgrade all First Sea weapons, you need to be at least in the Third Sea, because Soul Cane, Pole (1st Form) and Saber require Radioactive Material, and the Bazooka requires Dragon Scales.

Total cost to upgrade everything

To upgrade all weapons in the game (excluding Triple Dark Blade), you need exactly:

Material	Quantity
Bones	800
Scrap Metal	432
Leather	399
Magma Ore	149
Dragon Scale	104
Angel Wings	79
Fish Tail	79
Mystic Droplet	69
Mini Tusk	58
Vampire Fang	49
Ectoplasm	40
Radioactive Material	30
Demonic Wisp	18
Conjured Cocoa	16
Azure Ember	10
Blaze Ember	10
Dark Fragment	5
Meteorite	4

Did you know?

Once an item is upgraded, a small white star appears in the top-left corner of its icon in your inventory - handy for spotting at a glance what still needs to be done.
Weapons obtained in the First Sea gain proportionally more from upgrading than those from the Second or Third Sea, likely because weapons naturally become better as you progress.