Kamen Rider Ryuki:
The Coming Darkness!
Prologue:
The Rider War waged on. All thirteen riders fought for the prize. The person who started the war, KanZaki Shiro, was happy with how things were progressing. But he wanted things to go faster. He wanted to end the war soon, in order to save his little sister, Yui. He knew exactly what to do. He had found a retired old executioner, by the name of Soichiro Mikami.
Poor Soichiro lost his family to the hands of a murderer. He didn't know what to do, he was at his ropes end until...
"You wish to see them again, don't you?", came a voice from the mirror.
"W-who said that?", said Soichiro in surprise.
"Over here Mr. Mikami. I know of a way you can see your family again. You can bring them back to life, but on one condition.", KanZaki explained.
"You lie, the dead can't be brought back.", Soichiro laughed.
"Oh but they can, and all you need to do is use this.", said KanZaki as he produced a deck from his coat.
"Haha, how can a deck of cards bring my wife and daughter back?"
"It can if you win my Rider War."
"War, I don't know if you've noticed kid but, I'm an old man, I can't go fighting a war.", Soichiro scoffed as he walked away.
KanZaki just left the deck on Soichiro's table. "Think it over, this is no ordinary deck of cards. With it you can fight like you were 20 years younger. With it you can do yourself the justice that you deserve, you could become the executioner of the riders, a 'nightmare' they need to have. There is a prize for the winner.", KanZaki explained.
This stopped Soichiro in his tracks. "Prize, what kind of prize?"
"Anything, riches, a whole new life... your family. All you have to do is fight. And I almost forgot, who was it that killed your family?"
"Asakura... Takeshi Asakura!"
"That's just perfect, you will get to fight him. You will get your justice."
"If I can avenge my wife and daughter and get to see them again, I'll do it.", Soichiro said as he picked up the deck.
"Good!"
"Just one thing.", Soichiro said as he grasped the deck. "Tell the riders, the reaper is coming for them."
"It shall be done.", KanZaki answered before disappearing into the mirror.