The technique is strong enough to severely damage Sōsuke Aizen in his strongest evolutionary stage and force him to regenerate at a previous stage. Afterwards, the energy continues to rise before dissipating into the sky. Doing so causes a massive veil of black Reiatsu to erupt upwards and approach the target, darkening the sky and heavily damaging anything caught within the blast. Mugetsu (無月, Moonless Sky): Generating a blade of deep black Reiatsu in his hand, Ichigo swings it towards his target.However, when Ichigo lost his Reiryoku, a tiny portion of it accumulated in a single location inside of him over time, and he began to regain it slightly after a year and a half. Any remaining Reiryoku will stabilize, and he will awaken some time later (roughly a month), followed shortly by the loss of his remaining Reiryoku. Afterwards, he will lose consciousness, accompanied by intense pain, with the loss of his Shinigami powers following. Once it is used, the transformation dissipates. īeing in this form allows Ichigo to use Mugetsu. In this form, Ichigo's body constantly emits smoky black Reiatsu, most of which is focused around his right arm. Black, flame-like markings spread across his chest and wrap around his left arm, and the remains of a tattered black cloak cover his lower body. A bluish-gray, bandage-like carapace forms around his torso, right arm, neck, and over the nose and mouth in mask fashion. It is referred to as the Final Getsuga Tensh due to the fact that, once used. For the duration of the ability, Ichigo's hair color turns black and rapidly grows to waist-length. By using this technique, Ichigo becomes Getsuga (, Moon Fang) itself.
![bleach ichigo final getsuga tenshou bleach ichigo final getsuga tenshou](https://m.media-amazon.com/images/I/51J3TZ6zrnL._AC_SX355_.jpg)
![bleach ichigo final getsuga tenshou bleach ichigo final getsuga tenshou](http://vignette2.wikia.nocookie.net/playstationallstarsfanfictionroyale/images/3/3f/Ichigo-Final-Getsuga-Tensho-02.png)
It is referred to as the "Final" Getsuga Tenshō due to the fact that, once used, Ichigo loses all of his Shinigami powers. By using this technique, Ichigo becomes Getsuga (月牙, Moon Fang) itself.