Issen

Issen (One Flash/Brandish), also known as the Lightning Blade is a recurring mechanic in the Samurai Shodown series.

Description
In ode to the philosophy of battles ending in a single stroke of the blade, user performs a fast-advancing dash attack that upon contact with the opponent, will slash across the opponent. The user then strikes a pose while their opponent gushes out blood.

Strategy
Issen is fully invulnerable on startup, and projectile invulnerable for the whole animation. The amount of damage that Issen will do is based on the remaining amount of time you have while in Rage Explosion. The more time you have left, the more damage it will do. Issen also acts as an anti-air from point blank to nearly full screen. For this reason, jumping during an opponent's rage explosion is highly risky.

Although Issen is extremely powerful, it does have its downsides. For one, it is blockable, and very punishable if whiffed. Issen cannot be cancelled into from normals, but can be used during recoil weapon clashes.