Can be traded for the Dragonrider Soul with Straid of Olaphis at the Straid's Cell bonfire in The Lost Bastille.
Can be traded for the Old Dragonslayer Soul with Ornifex near the Lower Brighstone Cove bonfire in Brighstone Cove Tseldora.
Drakewing Ultra Greatsword
Can be traded for the Guardian Dragon Soul with Ornifex near the Lower Brighstone Cove bonfire in Brighstone Cove Tseldora.
in Forest of the Fallen Giants. After defeating The Pursuer, move ahead
to these broken walkways. Look below for ruins you can safely drop to.
On the way down these debris shelves is a corpse holding the sword.
is found in the Forest of Fallen Giants. At ground level outside of the
Cardinal Tower bonfire is a tunnel with a fire-spitting enemy. Dash
through the tunnel to find a door midway through; open it to find a
small room with a chest containing this weapon.
Heide Knight Sword
can encounter the Heide Knight a few times throughout the game, first
at the Forest of Fallen giants up the first ladder, then later atop the
ramparts in The Lost Bastille. Kill him, and he'll drop this weapon.
King's Ultra Greatsword
Can be traded for the Soul of the King with Ornifex near the Lower Brighstone Cove bonfire in Brighstone Cove Tseldora.
Lightning Short Sword
As you approach the final section of Iron Keep, you'll pass a block of fire-breathing horse heads. It'll probably cost you a life, but you can loot the corpse between two of the heads for this sword.
Lost Sinner's Sword
Can be traded for the Soul of the Lost Sinner with Ornifex near the Lower Brighstone Cove bonfire in Brighstone Cove Tseldora.
find this in the castle area of Forest of the Fallen Giants. When you
spot this enemy ahead, make a right. Climb the ladder and enter the
hallway atop the castle wall. Drop through the opening here to battle
three undead knights; the chest nearby contains the weapon.