|Soul Calibur (Final Form)|
|Native skill||Nullify Aerial Control|
Soul Calibur (Final Form) is Siegfried's strongest weapon in Soulcalibur IV. It can be bought in Character Creation for 30,000 Gold after completing Story Mode with Siegfried. It has Nullify Aerial Control equipped by default as a skill, which prevents opponents from gaining aerial control until the character is attacked three times in the air. Purchasing this weapon also unlocks an Achievement/Honor. It is used by Siegfried if he is fought in Story mode as the final boss.
The appearance of this sword is that of its regular version, but it is emitting large amounts of blue energy and a glowing aura.
- Soul Calibur (Final Form) can be seen in Soulcalibur IV when playing through the story of a character whose final boss is Siegfried. The sword is seen, wielded by Siegfried.
- During the Opening Cinematic for Soul Callibur V, Soul Calibur (Final Form) is seen wielded by Siegfried, while Soul Edge (Final Form) is seen wielded by Nightmare.