Official Move Approval IV

[Amaterasu]

Normal Move: 600 OM
Yojimbo Style: The Cinematic
Requires Insight, Burst Movement

Hiro must have been in combat with an enemy for at least one minute, or been hit with one of another Prime's Moves. Once these conditions are met, Hiro activates his goggles and compiles any data he has gathered into an analyzing algorithm. He must focus on his enemy for at least thirty seconds, and cannot attack during this period; although he can defend and move around.
Once he has analyzed a target sufficiently, he can begin to charge his attack. Placing one hand on his katana hilt, he grips it tightly and focuses on the enemy's weak point. He must stay still to charge this strike for a minimum of 5 seconds, to a maximum of twenty seconds, and the charge time is proportional (on a 2:1 basis; a charge time of five seconds takes 3 seconds for the damage to take effect, ten seconds equals five, etc.) to how long the damage is delayed.
Once the strike is sufficiently charged, Hiro dashes forward with near instant speed and unleashes the attack, striking the analyzed weak point. This strike is fast enough to nearly be invisible, and in fact, no visible damage appears or is felt until half the charge time passes, at which point the cut erupts in a spray of blood/fluid/oil/etc and the damage is taken.

(this is just unofficial commentary - other staff can overrule me on this!)
You should perhaps precise what exactly "defend" during the focusing period is. Does it include defensive moves? You might also want to add that charging your strike makes it more damaging, if that's the chargeup's purpose.