Boss Soul Weapons | Dark Souls 3

Boss Soul Weapons in Dark Souls 3 are obtained by Soul Transposition. You may also obtain spells and rings from them. To transpose a soul, defeat the respective boss, then take the soul to Ludleth of Courland. He sits on the mid-left throne (looking at Lothric's throne while standing at Firelink) This mechanic is only available after defeating the Curse-Rotted Greatwood, and recieving the Transposing Kiln and giving it to Ludleth.

Boss Soul Melee Weapons in DKS3

Icon & Name	Boss Soul Required	Cost
Hollowslayer Greatsword	Soul of the Rotted Greatwood	1000
Arstor's Spear	Soul of the Rotted Greatwood	1000
Vordt's Great Hammer	Soul of Boreal Valley Vordt	0
Crystal Sage's Rapier	Soul of a Crystal Sage	0
Farron Greatsword	Soul of the Blood of the Wolf	0
Wolf Knight's Greatsword	Soul of the Blood of the Wolf	10000
Dancer's Enchanted Swords	Soul of the Dancer	0
Wolnir's Holy Sword	Soul of High Lord Wolnir	0
Demon's Greataxe	Soul of a Demon	0
Demon's Fist	Soul of a Demon	0
Old King's Great Hammer	Soul of the Old Demon King	0
Greatsword of Judgment	Soul of Pontiff Sulyvahn	3,000
Profaned Greatsword	Soul of Pontiff Sulyvahn	3,000
Yhorm's Great Machete	Soul of Yhorm the Giant	0
Cleric's Candlestick	Soul of the Deacons of the Deep	0
Dragonslayer Greataxe	Soul of Dragonslayer Armour	0
Moonlight Greatsword	Soul of Consumed Oceiros	10000
Gundyr's Halberd	Soul of Champion Gundyr	0
Lothric's Holy Sword	Soul of the Twin Princes	5,000
Lorian's Greatsword	Soul of the Twin Princes	0
Twin Princes' Greatsword	Lorian's Greatsword + Lothric's Holy Sword
Storm Curved Sword	Soul of the Nameless King	5000
Dragonslayer Swordspear	Soul of the Nameless King	10000
Firelink Greatsword	Soul of the Lords	15000
Friede's Great Scythe	Soul of Sister Friede	10000
Rose of Ariandel	Soul of Sister Friede	3000
Valorheart	Drop from Champion's Gravetender & Gravetender Greatwolf boss fight
Demon's Scar	Soul of the Demon Prince	10,000
Frayed Blade	Soul of Darkeater Midir	5,000
Gael's Greatsword	Soul of Slave Knight Gael	20,000

Boss Soul Spells

Icon & Name	Boss Soul Required	Cost
Crystal Hail	Soul of a Crystal Sage	1,500
Deep Soul	Soul of the Deacons of the Deep	0
Black Serpent	Soul of High Lord Wolnir	0
Chaos Bed Vestiges	Soul of the Old Demon King	5,000
Lifehunt Scythe	Soul of Aldrich	5,000
Soothing Sunlight	Soul of the Dancer	5,000
White Dragon Breath	Soul of Consumed Oceiros	10,000
Lightning Storm	Soul of the Nameless King	5,000
Sunlight Spear	Soul of the Lords	10,000
Seething Chaos	Soul of the Demon Prince	10,000
Old Moonlight	Soul of Darkeater Midir	15,000