New Headcanon Book

Amphibia X OOO: Destruction gems and the black Core medals (OC, crossover)

Long after the Defeat of the Core and peace is brought upon Earth and Amphibia, something is lurking underneath the shadows..

A Organization know as Foundation Delta started the recreation of the Calamity gems however, the process of recreating them results in the Rebirth of the Core but as a AI, Foundation Delta, being a place of research has some bad apples within it, and such is the Medals (In my headcanon, the amphibia version of Foundation X was Foundation Delta who supplanted itself into recreating life instead of finding a solution to reverse aging) and mysterious disk drivers know as the Terra drivers. The Core in question asked the researcher to start recreating the calamity gems again, but in doing so, birthing the Destruction Gems, the antithesis to calamity, The Ego, the Id, and The Superego *opposition to the Heart, Wit, and Strength*. 

However the destruction gems in question suddenly rebels against the Core and Foundation Delta and escaped.

The Guardian, sensing that the core is returned, summoned Anne Boonchuy, Sasha Waybright, and Marcy Wu into the unnamed afterlife which the deity explained of the Core Return, however a another problem sets in that the three gems of destruction latched into three places, One is buried in the ruinous temple *Greece*, One is in the ancient dynasty like structure *China*, and one is hidden underneath the volcanic core *Hawaii*. While the explanation is lengthy long, Someone enters the afterlife.

"I hope i had the guts tomorrow" A mysterious man was brought into the islands and confused. "And find my way back home"
Welp the Guardian brought Eiji hino (Kamen Rider OOO Protagonist) back to life, and with the calamity trio shocked by the appearance of a masked rider (My headcanon was that the calamity trio watched tokusatsu shows*Marcy likes Ultraman, Sasha likes super sentai, anne likes Kamen Rider*. however Anne is excited to meet the OOO Protagonist for sure. Right after introductions, A sudden shaking is felt as the three destructions gems revive Kamen Rider Shadow Core via the black core medals and the destruction gems power