I'm a little surprised to realize that no one seems to have posted a
stunt concept like this, so I'm going to. Below is the Weapons
version of the stunt. All mentions of "sword" can be replaced with
any weapon, but I'm using sword because this is the typical example.

Air Slash

You've mastered the sword to a degree that gives you mystical prowess
with its edge. With a mighty swing, you turn the very air into an
extension of your blade. With this stunt, you may make an attack at a
range of 1 Zone whenever you hold a sword at no penalty, without
moving into the same zone as your attacker. This is still considered
a Weapons attack, and therefore Fists and Weapons can be used to
defend against it.

The Fists version of the stunt may well be known as a different
name... HADOKEN!

No prerequisites are listed because I don't care enough to make up a
prerequisite line for it when that whole concept seems to be getting
dropped from the system. Thoughts?