Running low on healing items in Dark Souls 3 will quickly cut your journey short. Managing your flask economy is the single most important skill for survival against brutal bosses like Pontiff Sulyvahn and The Nameless King. While true infinite flasks aren't a mechanic built into the base game, tracking down every Estus Flask Shard and Undead Bone Shard lets you carry up to 15 flasks reinforced to maximum healing power. This transforms your survival odds in Lothric.
This guide details exact locations for all 17 upgrade items, breaks down how flask scaling works, and fixes common routing mistakes that players make during early-game progression.
Understanding the Estus System
Before sprinting across the map, it helps to understand how flask upgrades work. Dark Souls 3 splits flask enhancement into two distinct upgrade paths managed by different NPCs at Firelink Shrine:
- Estus Flask Shards: Hand these to the Blacksmith Andre to increase your total number of usable flasks, capping at a maximum of 15.
- Undead Bone Shards: Burn these in the Firelink Shrine bonfire to increase the amount of HP (or FP) each flask restores, capping at +10 reinforcement.
You can freely allocate your total flask pool between Estus (HP) and Ashen Estus (FP) by talking to Andre. If you play a pure melee build, allocating all 15 charges to health gives you maximum margin for error.
Early Game Shards (High Wall of Lothric & Undead Settlement)
Securing your first few shards early makes the brutal transition from the High Wall to the Road of Sacrifices much more manageable.
High Wall of Lothric Shard
From the Tower on the Wall bonfire, head down the stairs inside the stone tower where you meet Greirat. Exit through the lower doorway onto the wooden roofs guarded by hollows. Drop down to the stone patio below where a winged knight patrols. Instead of fighting him immediately, run into the dark stone room on the lower level. The shard sits on an altar surrounded by praying hollows.
Undead Settlement Shard
From the Dilapidated Bridge bonfire, head outside into the open yard where the giant giant throws giant spears from the tower above. Run past the burning tree surrounded by hollow worshipers toward the small shack on the opposite side. Enter the shack and find the shard resting on a stone floor near a dead body.
Road of Sacrifices Shard
Located right after defeating the Crystal Sage boss. Proceed through the doorway leading toward the Cathedral of the Deep exterior. Just outside the stone archway on the right, resting against a cliffside wall near a group of hostile hollow slaves, lies the third shard.
Mid Game Shards (Cathedral, Catacombs, and Beyond)
As the game opens up, shards become slightly better hidden, often tucked away behind optional minibosses or environmental puzzles.
Cathedral of the Deep Shards
There are two shards hidden within this massive zone:
- The Cemetery Shard: Just outside the Cleansing Chapel bonfire, head down the main path toward the graveyard filled with reanimating hollows. Stick to the left wall until you find a small alcove guarded by a hollow wielding a heavy cross. The shard sits on a grave marker.
- The Interior Shard: After lowering the main shortcut bridge inside the cathedral, navigate the rafter beams above the giants. Drop down onto the stone ledge leading to Rosaria's Bed Chamber, but jump to the small platform midway down to grab the shard from a weeping hollow.
Smirking Demon Ruin Shards (Catacombs of Carthus & Smouldering Lake)
- Catacombs of Carthus: From the second suspension bridge, cut the ropes to drop it into a ladder. Climb down into the Smouldering Lake entrance area or explore the rat-infested corridors near the multi-wheeled skeleton enemies to locate the shard on a corpse.
- Smouldering Lake: Inside the giant underground cavern, head down the tunnels to the right of the giant ballista. Watch out for the giant sandworm. Duck into the alcoves lining the brick tunnels where wandering ghru enemies hide to find the shard sitting near a crumbling pillar.
Late Game Shards (Irithyll, Profaned Capital, and Lothric Castle)
The final pieces require navigating high-level areas packed with aggressive enemy placement.
Irithyll of the Boreal Valley Shard
From the Church of Yorshka bonfire, exit into the misty graveyard filled with invisible screaming hollows and skeletal hounds. Hug the left brick wall until you enter a small stone mausoleum or courtyard area guarded by a Fire Witch. The shard rests on an altar at the back of the room.
Anor Londo Shard
Before entering the massive doors to fight Aldrich, Devourer of Gods, explore the giant spiral staircase tower. Take the elevator down to the revolving bridge switch area. Ride the platform back down or explore the dark chamber beneath the giant statues to locate the final standard world shard.
Grand Archives Shard
After defeating the Dragonslayer Armour, proceed into the Grand Archives. Open the shortcut door that leads back to the exterior rooftop bridge where the three gargoyles attack. Climb the stone steps to the very top outdoor terrace where the three winged knights patrol. Defeat them and check the open stone gazebo at the edge of the roof to find the final shard.
Essential Undead Bone Shard Locations
Without upgrading your flask potency via Undead Bone Shards, having 15 charges won't save you from late-game bosses. Here are four essential locations to grab early:
- Undead Settlement: From the Foot of the High Wall bonfire, cross the bridge and enter the white-walled building. Head out the back balcony and look down at the burning tree yard; the shard is burning on a stone monument.
- Cathedral of the Deep: Outside the front facade of the cathedral, past the giant hollow archers, climb the tall stone stairs leading to the locked main doors. The shard sits right in front of the giant wooden doors.
- Farron Keep: From the Keep Ruins bonfire, step out into the poison swamp and head straight toward the three massive stone pillars. Look for a ruined tower guarded by slug monsters. Inside sits the bone shard.
- Irithyll Dungeon: Inside the multi-level cell block, find the room with the hanging corpse holding an item over a giant chasm. Drop down carefully onto the wooden scaffolding below to loot the shard.
Common Routing Mistakes
Many players struggle with flask progression because they skip optional areas or miss key NPC triggers. Avoid these common errors:
- Neglecting Undead Bone Shards: Players often focus entirely on finding Estus Flask Shards while ignoring bone shards. A +0 flask healing 250 HP at level 80 will leave you vulnerable even if you have 15 charges.
- Killing Greirat Too Early: Make sure you complete Greirat's scavenging questlines properly, as he provides crucial upgrade inventory items and consumables that assist exploration.
- Missing Cathedral Exploration: Skipping the optional roof exploration in the Cathedral of the Deep means missing both a flask shard and crucial covenant items.
Frequently Asked Questions
Can you get infinite Estus Flasks in Dark Souls 3?
No, the game caps your maximum Estus Flask count at 15. Once you collect all 11 Estus Flask Shards and combine them with your starting 4 flasks, you reach the absolute limit.
What happens if I start a New Game Plus?
All collected Estus Flask Shards and Undead Bone Shards do not carry over your active inventory count into New Game Plus, but your flasks remain fully upgraded based on what you unlocked. You must recollect shards on your new playthrough if you want to rebuild max flasks.
Do Ashen Estus Flasks use separate shards?
No. Estus Flask Shards upgrade your total pool of flasks universally. You choose how many of those total 15 slots are dedicated to HP recovery versus FP recovery by talking to Andre at Firelink Shrine.
What is the maximum reinforcement level for flasks?
Estus Flasks cap at +10 reinforcement using Undead Bone Shards burned at the Firelink Shrine bonfire, maximizing the HP restored per gulp.
