(Fūton: Kū Sora ) – Wind Style: Spirit Void
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Type: Defensive/Supplementary
Rank: S
Range: Short - Long
Chakra: 40 (-10 each time it's used)
Damage: N/A
Description: A technique simple in nature, but extremely effective, Spirit Void was one of Roy Mustang's own creation. Versed in it's defensive capabilities, the jutsu begins once the user channels and sends a a copious amount of his chakra into the skies above, ranging from short to long range all around. Following this ensues an unpredictable and quick movement of visible Wind in the skies, continuously flowing and swerving, seemingly without purpose before heading downwards and disappearing into nothing. However, purely through the users will (or through hand/leg/general body movement for cosmetics) the user can harness the wind power to create a defence which leaves the user unharmed. When seeing an incoming attack, through will the user controls the wind around the jutsu and forms it around the incoming attack, where the Wind would then slices/cut through it and/or blows it away, depending on the nature of the attack. For example, an Earthen projectile could be sliced and cut until it is no longer a danger, whereas a Water attack would be blown back. Of course when being used to defend, the Wind once again becomes visible to the naked eye, showing a green-ish hue. Although the process at the beginning appears to take time, when used within the same time frame of an incoming attack, the defense would be able to work just as well as any other Wind jutsu. This technique will only activate against techniques that it can neutralize (as an S-Rank Wind) and it will only activate once per turn and it cannot be stacked with other automatic defense jutsus.
~ Can only be taught by Erzo. This jutsu can be used twice, lasting four turns each time. Cannot be used consecutively, but instead with a one turn wait after four turns are up/the jutsu is deactivated. Although the user can manipulate this jutsu through will, thus allowing himself to remain unoccupied and free to perform other techniques, when used to defend against other techniques it will still count as one of the three allocated moves per turn.