Hachi pointo kōgeki.

Name Of Your Techniqure:
Hachi pointo kōgeki.

Eight point attack
How You Learned It:
The latest attack learned from his master
Effect:
The affect is simple. The attack uses the speed of Kami no kun to attack the standard 8 points. It's used with such speed that all of these points are struck nearly simultaneously.(nearly) it moves with such speed that one thinks it moves that fast. These are the standard 8 points of any samurai would know..

Spoiler:

Cooldown:
Because of the power and way of the attack it will take ten of Tenji's posts to be able to use it again.
Duration:
Same post it's activted

Please specify where the "standard 8 points" are that the technique will be aiming for, not everyone is going to be familiar or know exactly what that is. Also I can't allow 8 simultaneous attacks at once, the strikes can be in rapid succession but not all at the same exact time.

Lastly for duration just simply use a number of posts, the speed at which you activate/utilize the technique is irrelevant to how long it lasts.

How's that

That works, especially with the visual and all. But just change your duration to one post.