|Soul Edge (Final Form)|
|Weapon type||Soul Edge|
|Native skill||Auto Unblockable Attack A|
Soul Edge (Final Form) is Nightmare's strongest weapon in Soulcalibur IV. It can be bought in Character Creation for 30,000 Gold after completing Story Mode with Nightmare. It has Auto Unblockable Attack A equipped by default as a skill, which gives the player a high chance of turning the next high damage attack into an Unblockable Attack. Purchasing this weapon also unlocks an Achievement/Honor.
Soul Edge (Final Form) has the regular appearance of Soul Edge, however it appears to be emitting massive amounts of energy, as it appears to glow with some strange, evil, electrical red aura.
- Soul Edge (Final Form) can be seen in Soulcalibur IV when playing through the story of a character who's final boss is Nightmare. The sword is seen, wielded by Nightmare.
- During the Opening Cinematic for Soulcalibur V, Soul Edge (Final Form) is seen wielded by Nightmare, while Soul Calibur (Final Form) is seen wielded by Siegfried.