Caryll Runes are Bloodborne's version of a passive buff system, letting you slot powerful modifiers that boost your health, resources, and combat without costing you a single level. Many new players underuse them, leaving real power on the table. This guide explains how the rune system works, the best everyday runes, and the special oath runes that can transform your hunter entirely.
Bloodborne released in 2015 and has not changed mechanically in years, so the details here are stable. I cross-checked the specifics against the Bloodborne Wiki on Fextralife, the Fandom Bloodborne Wiki, and the r/bloodborne community, all checked in October 2026. Where an exact numeric value could mislead, I have kept it qualitative and pointed you to verify it in-game or on the wiki.
How the rune system works
Runes are discovered throughout Yharnam, often as transcriptions you find on bodies, from enemies, or as rewards for defeating certain bosses. To equip them you need the Rune Workshop Tool, obtained early in the game, which unlocks the Memory Altar in the Hunter's Dream. There you slot runes into a set of rune slots, and you can swap them freely at any time.
You have three standard caryll rune slots plus a separate oath rune slot. The three standard slots take the everyday buff runes, while the oath slot is reserved for special covenant-style runes that come with transformative effects. Because you can change runes whenever you are in the Dream, it is worth collecting a variety and tailoring your loadout to the situation, such as swapping in a farming rune before a grind or a defensive rune before a hard boss.
Many runes come in tiers, with higher tiers found later in the game providing a stronger version of the same effect. Finding the top-tier version of a rune you rely on is a meaningful upgrade, so it is worth keeping an eye out as you explore and clear optional areas.
The everyday workhorse runes
A few runes are useful on almost any build. The Moon rune increases the Blood Echoes you gain, which is invaluable for leveling and buying gear, and is a staple in any farming loadout. Runes that increase your maximum health are among the most popular, giving you a larger buffer that benefits every playstyle. Runes that raise your Quicksilver Bullet capacity are essential for firearm-heavy and arcane builds that burn through bullets.
There are also runes that boost your blood vial or bullet carrying capacity, increase specific defenses, speed up stamina recovery, or improve the health you regain from visceral attacks. The Communion rune raises your maximum blood vials, and runes like Blood Rapture restore health on visceral attacks. A sensible default loadout for most players is a health rune, a Blood Echoes or resource rune, and a bullet or vial capacity rune, adjusted to your build.
Oath runes and covenants
The oath rune slot is where things get interesting. Oath runes function like covenants, aligning you with one of the game's hidden factions and granting passive effects that can influence online play and summon behavior. Equipping a particular oath rune signals your allegiance and can change which bell-ringing women and cooperators you interact with, as well as providing a combat benefit.
Beyond their online implications, oath runes are home to two of the most build-defining runes in the game, which I will cover next. For most players, the oath slot is less about the covenant mechanics and more about these special transformative runes, which can completely change how your hunter plays. The covenant layer is a deeper, more cryptic part of Bloodborne that rewards experimentation and reading the wiki.
The transformative runes: Beast's Embrace and Milkweed
Two oath runes stand out because they fundamentally change your character. Beast's Embrace lets you permanently assume the beast form normally granted temporarily by the Beast Blood Pellet, dramatically boosting your physical attack while you wield the Beast Cutter and leaning into an aggressive, feral playstyle. It is the centerpiece of a dedicated beast-themed build.
Milkweed, obtained late in The Old Hunters, is the rune that unlocks the Kos Parasite's full potential, transforming its attacks into writhing arcane tentacles that scale enormously with the Arcane stat. For an arcane hunter, Milkweed is the capstone of the entire build, and it is covered further in our arcane build guide. These two runes show how the oath slot can be far more than a passive buff; it can redefine your whole approach to combat.
Building a rune loadout
For a first playthrough, a practical loadout is a maximum-health rune, the Moon rune for extra Blood Echoes while you level, and a Quicksilver Bullet or blood vial capacity rune depending on whether you lean on firearms. Swap the Moon rune for a defensive or combat rune before a difficult boss, and swap it back when you want to farm. The ability to change runes freely means you should treat them as a flexible toolkit rather than a fixed choice.
As you progress, keep upgrading to higher-tier versions of your favorite runes and experiment with the oath slot once you have access to the transformative runes. Runes interact with your stats and build, so the ideal loadout for an arcane hunter differs from that of a Strength bruiser; see our best builds guide to match your runes to your archetype.
Where runes come from and how to prioritize them
Runes are scattered across Yharnam in several ways. Many are found as transcriptions on corpses or in hidden corners, rewarding thorough exploration. Others drop from specific bosses, including several optional ones, which is a strong reason to take on side encounters you might otherwise skip. A few of the most powerful runes, including the build-defining oath runes, are tied to progressing particular questlines or reaching the DLC. Because of this spread, a hunter who explores carefully and clears optional content ends up with a far richer rune collection than one who rushes the critical path.
When deciding what to equip, let your immediate needs guide you. Early on, a health rune and the Blood Echoes rune smooth out leveling and survivability more than anything flashier. As you find higher tiers of your favorite runes, swap them in, since a top-tier version of a rune you already use is a free and significant upgrade that costs you nothing but the slot you were already spending.
Stacking effects and the covenant layer
Because you have three standard rune slots, you can stack effects to specialize your hunter. Equipping multiple health runes, or multiple runes that boost visceral-attack healing, compounds their benefit and can push a particular strength of your build to an extreme. A common offensive setup stacks runes that restore health on visceral attacks so that landing ripostes keeps you topped up, while a farming setup leans on the Blood Echoes rune. Treat the three slots as a loadout you retune for the task in front of you.
The oath rune slot ties into Bloodborne's cryptic covenant system. Equipping a given oath rune aligns you with one of the game's hidden factions and can influence online interactions, such as which other players' worlds you may be drawn into and how certain non-player hunters treat you. The covenants are deliberately underexplained by the game, and much of their behavior was mapped out by the community over years. For most solo players the oath slot is simply where you put a transformative rune, but if you engage with online play, the covenant you wear genuinely matters. Either way, runes are one of the easiest power gains in the game and one of the most overlooked, so make a habit of revisiting your loadout as you find new transcriptions.
Because changing runes costs nothing and can be done any time you are in the Hunter's Dream, the smartest thing you can do is experiment constantly rather than settling on one loadout and forgetting about it. Heading into a poison-heavy area, you might slot a rune that boosts your resistance to it; preparing for a long farming session, you swap to the Blood Echoes rune; facing a boss that chips you down, you equip stacked health or visceral-healing runes. None of these choices is permanent, so there is no wrong answer, only the loadout that best fits the next hour of play. Many players never realize how much free power is sitting unused in their rune slots simply because they set them once early and never revisited them. Make a habit of opening the Memory Altar whenever your situation changes, and you will get far more out of the system than a hunter who treats runes as a one-time decision. That flexibility is the whole point of the system, so use it.
Getting runes and resources without the grind
Collecting every rune and its highest tier means thorough exploration and some optional bosses. If you own Bloodborne and would rather enjoy a fully equipped hunter, the store offers a Bloodborne modded save and a max Blood Echoes, Insight and consumables package, both listed on the Bloodborne page. These are a convenience for existing owners, not a replacement for exploring Yharnam and learning what each rune does.
Frequently Asked Questions
How do I equip Caryll Runes?
You need the Rune Workshop Tool, found early in the game, which unlocks the Memory Altar in the Hunter's Dream. There you slot runes into your rune slots and can swap them freely at any time.
How many rune slots are there?
You have three standard caryll rune slots for everyday buff runes plus a separate oath rune slot reserved for special covenant-style and transformative runes.
What is the best Caryll Rune?
It depends on your goal, but the Moon rune for extra Blood Echoes, a maximum-health rune, and a Quicksilver Bullet capacity rune are staples. The best oath runes are build-defining, like Milkweed for arcane hunters.
What does the Milkweed rune do?
Milkweed, found late in The Old Hunters, unlocks the Kos Parasite's full potential, turning its attacks into arcane tentacles that scale heavily with Arcane. It is the capstone of an arcane build.
What is Beast's Embrace?
Beast's Embrace is an oath rune that lets you permanently take the beast form while wielding the Beast Cutter, boosting physical attack for an aggressive, feral Strength-style playstyle.
Can I change runes whenever I want?
Yes. You can swap runes freely at the Memory Altar in the Hunter's Dream, so treat them as a flexible toolkit, equipping farming runes before a grind or defensive runes before a hard boss.