Satanium

Satanium was a new mineral discovered by physicist Tetsuo Okita, more powerful than uranium and emitted destructive effects to anyone exposed to it. However, Destron abducted Okita in hopes of finding the source of Satanium and collecting more of it to expedite their run for global domination. Kamen Rider V3 went to rescue Professor Okita and prevent Destron from collecting more of the deadly mineral.