Kamen Rider Revice Scans: Details on Vistamps, George's Dad & Rex Deadman
This is a scan from Kamen Rider Revice Episode 1 where Vice appears before Ikki asking him to make a contract with him. Vice says "What do you think? Won't you make a deal with him? You can sell your soul to Devil".
George Karizaki's father had developed the Rider System 30 years back. That is after the end of Kamen Rider Black RX, but before Shin Kamen Rider: Prologue. The System he had developed mixes the powers of the Devil who resides inside you and the Memory of the Animal DNA in you.
Deadmans use the Vistamp to invoke the Animal DNA inside a human and turn them into a Deadman. The scan also says about the combat. They are called Gif Junior. But since the part of the scan is blurry, I can't tell if they are created by humans. Even the part in the scan where they explain about Gif is blurry to translate. The two monsters in the scans are the Deadman form of Furio & Orteca. They are seen saying "End of Patience! End of Sadness! End of Fake Happiness!".
This is the Deadman created using Rex Vistamp.