The costume has Don's main body color change to the two-tone color of blue and red. His face has been replaced with the emblem of Build.
As with the tradition of the Kamen Rider-inspired costumes, Kamen Rider Build (in his RabbitTank Form) can be seen riding Don on the top.
It cannot be mixed with the head gear.
How to obtain
Since Blue Version's version 3.07 update in Japan, the costume can be obtained by playing Be The One once. Norma clearing the song will also unlock the title 'The rules of victory has been set! (Japanese: 勝利の法則は決まった！, Shōri no ōsoku wa kimatta!)'.
Players will no longer able to obtain the costume and the title after June 27, 2019. Those who already owns those will be able to keep them.
- The title is a catchphrase said by the protagonist Sento Kiryu whenever he has an advantage in battle.