Dark Souls 3 - Guide - What you can get from Soul Transposition

Boss Souls always are an major mechanic to get those great special items in the Dark Souls series.
Dark Souls 3 is no different and you are able to trade the Boss Soul for a weapon, spell or equipment with Soul Transposition.

In order to create the special (Boss)item want, you must have the specific Boss Soul.
There is one condition before you can trade a Boss Soul though.
You will need the Transposing Kiln which drops from Curse-Rotted Greatwood.

Curse-Rotted Greatwood is an optional boss so it can be missed, he is found near the end of the Undead Settlement (first big zone)
After you kill the Curse-Rotted Greatwood you will receive the Transposing Kiln.

You can then go to Ludleth of Courland, which you find sitting on second throne - look upward when you are standing near the bonfire and you will find 5 thrones - starting from the left side in the Firelink Shrine.

Ludleth of Courland the only Lord Of Cinder who actually wants to link the Flame again.

After you place the 5 (Ludleth included) Cinders of Lord he(Ludleth) will die, but you can still transpose boss souls IF you gave the Transposing Kiln already.

See below for what Boss Souls give which weapon, spell, item.

Soul of Boreal Valley Vordt
Weapon - Vordt's Great Hammer (0 Souls)
Ring - Pontiff's Left Eye (0 Souls)
Souls Gained when used: 2,000

Soul of the Rotted Greatwood
Weapon - Hollowslayer Greatsword (1,000 Souls)
Weapon - Arstor's Spear (1,000 Souls)
Souls Gained when used: 3,000

Soul of a Crystal Sage
Weapon - Crystal Sage's Rapier (1,500 Souls)
Sorcery - Crystal Hail (1,500 Souls)
Souls Gained when used: 3,000

Soul of the Blood of the Wolf
Weapon - Farron Greatsword (0 Souls)
Weapon - Wolf Knight's Greatsword (10,000 Souls)
Souls Gained when used: 20,000

Soul of Rosaria
Miracle - Bountiful Sunlight (0 Souls)
Souls Gained when used: 5,000

Soul of the Deacons of the Deep
Sorcery - Deep Soul (0 Souls)
Weapon - Cleric's Candlestick (0 Souls)
Souls Gained when used: 20,000

Soul of High Lord Wolnir
Weapon - Wolnir's Holy Sword (0 Souls)
Pyromancy -  Black Serpent (0 Souls)
Souls Gained when used: 10,000

Soul of the Old Demon King
Pyromancy - Chaos Bed Vestiges (5,000 Souls)
Weapon - Old King's Great Hammer (0 Souls)
Souls Gained when used: 10,000

Soul of a Demon
Weapon - Demon's Greataxe (0 Souls)
Weapon - Demon's Fist (0 Souls)
Souls Gained when used: 20,000

Soul of Pontiff Sulyvahn
Weapon - Greatsword of Judgment (3,000 Souls)
Weapon  - Profaned Greatsword (3,000 Souls)
Souls Gained when used: 12,000

Soul of Yhorm the Giant
Weapon  - Yhorm's Great Machete (0 Souls)
Shield - Yhorm's Greatshield (0 Souls)
Souls Gained when used: 20,000

Soul of Aldrich
Miracle - Lifehunt Scythe (5,000 Souls)
Weapon  - Darkmoon Longbow (5,000 Souls)
Souls Gained when used: 15,000

Soul of the Dancer
Miracle - Soothing Sunlight (5,000 Souls)
Weapon  - Dancer's Enchanted Swords (0 Souls)
Souls Gained when used: 10,000

Soul of Dragonslayer Armour
Weapon  - Dragonslayer Greataxe (0 Souls)
Shield - Dragonslayer Greatshield (0 Souls)
Souls Gained when used: 15,000

Soul of Consumed Oceiros
Sorcery - White Dragon Breath (10,000 souls)
Moonlight Greatsword (10,000 souls)
Souls Gained when used: 12,000

Soul of Champion Gundyr
Weapon  - Gundyr's Halberd (0 Souls)
Ring - Prisoner's Chain (0 Souls)
Souls Gained when used: 20,000

Soul of the Twin Princes
Weapon  - Lothric's Holy Sword (5,000 Souls)
Weapon  - Lorian's Greatsword (0 Souls)
Transpose above weapons to get:
Weapon  - Twin Princes' Greatsword (0 Souls)
Souls Gained when used: 20,000

Soul of the Nameless King
Weapon  - Storm Curved Sword (5,000 Souls)
Weapon  - Dragonslayer Swordspear (10,000 Souls)
Miracle - Lightning Storm (5,000 Souls)
Souls Gained when used: 16,000

Soul of a Stray Demon
Ring - Havel's Ring (5,000 Souls)
Pyromancy - Boulder Heave (0 Souls)
Souls Gained when used: 20,000

Soul of the Lords
Miracle - Sunlight Spear (10,000 Souls)
Weapon  - Firelink Greatsword (15,000 Souls)
Souls Gained when used: 20,000

Soul of Sister Friede
Weapon  - Friede's Great Scythe (10,000 Souls)
Weapon  - Rose of Ariandel (3,000 Souls)
Souls Gained when used: 20,000