Jagged Steel is an early valley swordsman who crosses the shallows and follows with consecutive cuts. Cliffs and broken timber line the arena.

Beyond the red barrier, enter the creek arena and use the steps across the water as a landmark. Keep the fight on the broad stone ground.
Stop attacking when he raises the blade. Defend or evade sideways as he closes in. Watch for a follow-up after a block and punish only when the string ends.
Keep him centred when creating distance. Let him approach across the shallows, defend the incoming string and counter during recovery.
Continue along the valley after the fight. The route reference lists a namesake weapon; its reward prompt still needs verification.