Infusion

Weapons and Shields can be enhanced through Infusion, which adds elemental damage and/or modifies Scaling.

Infusions are conducted by Blacksmith Andre in the Firelink Shrine.

List of Coals

In order to conduct certain Infusions, Blacksmith Andre must be given the correct Coal to work with.
Four Coals are required to unlock all Infusions:

Key Item Usage Availability
Farron Coal
farron-coal-dish-small.jpg

Unlocks Infusion with Heavy Gems, Sharp Gems and Poison Gems.

On the Road of Sacrifices, in the building right above the Farron Keep Bonfire, guarded by a Black Knight.

Giant's Coal
giant-s-coal-dish-small.jpg

Unlocks Infusion with Lightning Gems, Simple Gems and Chaos Gems.

In Anor Londo, on the corpse of the Giant Blacksmith.

Profaned Coal
profaned-coal-dish-small.jpg

Unlocks Infusion with Dark Gems, Blood Gems and Hollow Gems.

Inside the Irithyll Dungeon, in a cell on the lower levels, guarded by several Wretches.

Sage's Coal
sage-s-coal-dish-small.jpg

Unlocks Infusion with Crystal Gems, Blessed Gems and Deep Gems.

In Farron Keep, inside a small structure guarded by a Darkwraith.

List of Gems

Weapons can be Infused with Gems, each of which has a different effect:
Gem Effect
Heavy Gem Increases Str. Scaling, but reduces base damage and Dex. Scaling.
Sharp Gem Increases Dex. Scaling, but reduces base damage and Str. Scaling.
Refined Gem Balances Str. and Dex. Scaling, but reduces base damage.
Raw Gem Increases base damage, but removes Str. and Dex. Scaling.
Crystal Gem Adds Magic damage and Int. Scaling, but reduces base damage and Str. and Dex. Scaling.
Simple Gem Adds Magic damage, Int. Scaling, and FP Regen, but reduces base damage and Str. and Dex. Scaling.
Fire Gem Adds Fire damage, but removes all Scaling.
Chaos Gem Adds Fire damage and Int./Fth. Scaling, but reduces base damage and Str. and Dex. Scaling.
Lightning Gem Adds Lightning damage and Fth. Scaling, but reduces base damage and Str. and Dex. Scaling.
Blessed Gem Adds Fth. Scaling and HP Regen, but reduces base damage and Str. and Dex. Scaling. Strong VS Undead.
Deep Gem Adds Dark damage, but removes all Scaling.
Dark Gem Adds Dark damage and Int./Fth. Scaling, but reduces base damage and Str. and Dex. Scaling.
Blood Gem Adds Bleed, but reduces base damage and Str. and Dex. Scaling.
Poison Gem Adds Poison, but reduces base damage and Str. and Dex. Scaling.
Hollow Gem Adds Lck. Scaling, but reduces base damage, and Str. and Dex. Scaling.
Shriving Stone Remove Infusions.

Limitations

The following Equipment cannot be infused:

Buffs and Infusion

Certain Infusions cannot be Buffed, i.e. affected by Spells like Magic Weapon or Consumables like Gold Pine Resin.

The following Infusions work with Buffs:

The following Infusions do NOT work with Buffs:

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