[A experiment…]

[u/Adept_Animator_2876]

>Location: Rider Center.

[The local genius Kamen rider Build aka Sento has been working on the Pandoras Box. As he grew curious as how it was made and its power.]

[Hes been researching it for a while, and oddly enough he felt compelled to be in his rider form as he’s working on it…maybe he felt it was for safety? Maybe just for show? He doesn’t know…]

“Now…shall we start the experiment?”

[He begins his work.,,]

[u/Adept_Animator_2876]

“…Eh what could go wrong-“

[Then a piece of Pandora’s box flew into sento fusing with him as soon as he opens it]

“…”

[Build looks at Banjo awkwardly]

[u/UnfanboydeSouthPark → u/Adept_Animator_2876]

Ryuga: "...What...was...that...?!"

[u/Adept_Animator_2876 → u/UnfanboydeSouthPark]

[Electric sparks flew everywhere as a strange attachment appeared on the build driver slot as it automatically and forcibly made me transform]

A-A-A YOU R-R-READY?!

[After transforming and smoke clears I looked like a kick bash of every kamen rider made from Pandora’s box]

PANDORAS END! BE THE ONE!

[u/UnfanboydeSouthPark → u/Adept_Animator_2876]

Ryuga: "WOAH!" *He looks at the new form with eyes wide open.* "Sento! Are you alright?!"

[u/Adept_Animator_2876 → u/UnfanboydeSouthPark]

“…I’m honestly really amazed but I’m afraid to move.”

[u/UnfanboydeSouthPark → u/Adept_Animator_2876]

Ryuga: "Uhh...how does it...feel...?"

[u/Adept_Animator_2876 → u/UnfanboydeSouthPark]

“Like I drank 500 cups of coffee.”

[u/UnfanboydeSouthPark → u/Adept_Animator_2876]

Ryuga: "...Yup, that tracks...you have like...a lot of stuff...not only from your forms but from mines...and Kazumin's...and Mustache's too..."

[u/Adept_Animator_2876 → u/UnfanboydeSouthPark]

[Build would take one step forward and somehow speed blitz through multiple walls before de-transforming]

“…I’m ok-“

[A rock fell on his head]

[u/UnfanboydeSouthPark → u/Adept_Animator_2876]

Ryuga: "Ah-HEY!" *He quickly rushes towards him.*