Black Leg V2 is the awakened form of the Black Leg fighting style in Haze Seas, a kick-based combat set inspired by Sanji from One Piece. It carries higher damage and reworked skills over the base version, but the upgrade is gated behind Third Sea progression, making it a late-game milestone rather than an early purchase.
Quick answer: Buy Black Leg V1 for 50,000 Beli, grind its Mastery to 300, unlock the Third Sea, then take 2 Phantom Lanterns and 5,000,000 Beli to the Sage of Combat on the Sea 3 Starter Island.

Black Leg V2 requirements
Everything the Sage of Combat checks before granting the upgrade is fixed. You cannot skip the mastery grind or the Third Sea unlock, and the Phantom Lanterns only drop from a single event.
| Requirement | Details |
|---|---|
| Base style | Black Leg V1, purchased first |
| Mastery | 300 with Black Leg |
| Sea access | Third Sea unlocked via its quest |
| Materials | 2× Phantom Lanterns |
| Cost | 5,000,000 Beli |
| Trainer | Sage of Combat, Sea 3 Starter Island |
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Black Leg V1 is the cheapest fighting style in the game and is built entirely around melee kicks. You need it before anything else, since V2 is an upgrade to it rather than a separate purchase.
From there, grind the style in active combat until Mastery reaches 300. Landing hits and defeating enemies is what raises the number, so grouping mobs and using your area moves speeds it up considerably.
Reach the Sage of Combat in the Third Sea
With 300 Mastery in hand, the next block is access. The Sage of Combat only appears once you are in the Third Sea, so you must clear the Third Sea unlocking quest before the upgrade is even possible.

Farm Phantom Lanterns from the Ghost Ship
Phantom Lanterns are the hard part. They drop at a 100% rate from the Ghost Ship event, which can only be summoned in the Third Sea. Each clear guarantees one lantern, so you will need to run the event at least twice.

| Fruit rarity | Points |
|---|---|
| Common | 1 |
| Uncommon | 3 |
| Rare | 5 |
| Legendary | 15 |
| Mythic | 20 |
When you hit 20 points, the Ghost Ship spawns and you will see the message “A phantom ship rises from the abyss…” Defeat the ship to collect your lantern.
Ghost Ship rewards
The lantern is the guaranteed prize, but the fight can hand over extra loot on top of it.
| Reward | Drop chance |
|---|---|
| Phantom Lantern | 100% |
| Ghost Chest | Guaranteed |
| Blade Fragment | 10% |
Confirming the upgrade worked
The upgrade is complete when the Sage of Combat accepts your 2 Phantom Lanterns and 5,000,000 Beli. Your Black Leg moveset swaps to the V2 skills and the “Leg of Fury” title is added to your account. If the Sage refuses the interaction, the usual reasons are Mastery still under 300, not enough Beli, or fewer than two lanterns in your inventory.






