The Uncrowned Prince rapier sword is one of those secrets in Assassin's Creed Black Flag Resynced that sits completely off the beaten path. No map marker points you toward it, no story mission sends you in its direction, and it sits underwater in a corner of the Caribbean most players sail right past. The good news: you can grab it at almost any point in the game without fighting a single enemy.
Where is the Uncrowned Prince rapier sword?
Head south to the Charlotte region and set your course for coordinates 500, 167. This puts you at a small inlet on the main island directly west of Kingston. Once you arrive, anchor the Jackdaw and step away from the wheel so you can move freely on foot.
Charlotte region coordinates 500, 167
From the shore, look for two large sections of cliff that jut out slightly over the water. Dive in and swim along the coral near the base of that wall. The landmark you're hunting for is a steady stream of bubbles rising from the seabed. Follow the bubbles down and you'll find a single underwater chest glowing white against the coral.
That chest contains two rewards:
- The Uncrowned Prince rapier swords
- The Guardian Beast figurehead
The area is completely free of sharks, jellyfish, and sea urchins, so there's no threat while you're searching. Take your time and follow the bubbles.
How do you equip the Uncrowned Prince?
Once the chest is looted, open your menu and navigate to Inventory, then select the rapiers to equip them as your active swords. If you prefer the look of the Uncrowned Prince but want to keep a different sword's stats, select Customize on your currently equipped blades and apply the Uncrowned Prince as a cosmetic skin.
The Guardian Beast figurehead works differently. Head to any Harbourmaster or visit the Captain's Quarters aboard the Jackdaw to equip it to your ship.
Equipping the Uncrowned Prince rapiers
Is the Uncrowned Prince rapier sword worth using?
The stats tell part of the story. The Uncrowned Prince carries 25 base attack and a maximum Takedown count of 3. Neither figure is going to make veteran players drop their current loadout mid-campaign. What actually makes this sword interesting is its passive ability: landing a defense break on an enemy restores a portion of your health.
That sustain passive changes the math depending on what you're doing. Here's a quick breakdown:
The strongest argument for picking these up is timing. Because the chest has no combat requirement and no story gate, you can collect it before you've unlocked much of anything else. For players still in the early and mid-game, the health-on-defense-break passive makes boarding fights and Fort assaults noticeably more forgiving. Tackling a Man O' War with limited upgrades becomes less punishing when every broken guard puts health back on the bar.
Uncrowned Prince stats and passive
For players who lean into action games that reward aggressive, high-volume combat, the Uncrowned Prince fits that style well. The passive is effectively wasted if you're picking off enemies one at a time, but in the chaotic scrum of a ship boarding with six enemies swinging at once, those defense breaks stack up fast.
What else should you collect in Black Flag Resynced?
The Uncrowned Prince is one of several secrets tucked away across the Caribbean that never get flagged on your map. If you enjoy hunting down hidden content, the game has plenty more to find. The sea shanty sheet music locations guide covers every floating song sheet for your crew, and if you want to understand the Jackdaw's full offensive capability, the Jackdaw secondary fire modes guide breaks down all four weapon types and how to unlock them.
For everything else the game has to offer, the full Assassin's Creed Black Flag Resynced guide collection is the fastest way to find what you need without sailing in circles.