Late submission for @smvillainsweek 2023 Day 3, theme: Prophecy.
This piece is also (loosely) inspired by the "Our Super Weapon R" fan manga from 2003, by Senhi Shinban and Kazuyuki Tsukine, though I've reworked the ideas to fit my own story:
"The peace talks between the Golden Kingdom of Earth and the Silver Millennium Kingdom of the Moon were finally going well.
The people of Earth would take more convincing, but Queen Calyce and Queen Serenity were already good friends, and agreed on a plan to establish nine "Crystal Points" within the Golden Kingdom, giving the Earth's people the same longevity enjoyed by those living on the Moon.
Prince Endymion and his four Heavenly Knights were busy keeping the peace, fending off a series of energy-draining attacks (perpetrated by servants of a mysterious Dark Pact: the dark "Princess" Osakaite, and her minion, Ullmannite the spy).
In the meanwhile, the prince sent his trusted assistants, the Seven Warriors of Fortune, to meet with the four guardian soldiers of the Moon Princess to help plan the Crystal Points.
The shy young Warrior Bunbo and the kind genius Sailor Mercury got along quite well- but when Bunbo finally worked up his courage to shake her hand, he had a terrible vision- and the dreadful feeling that it was already too late...!"
The day 4 piece goes with this one, and includes an explanation of the manga "Our Super Weapon R" (which has a different telling of the Seven Great Youma's adventures during the corruption of the Earth Kingdom):