According to the lore text at the bottom of the card, the creatures are trapped on a rock (possibly an asteroid.) Someone left behind an encrypted log recording the existence of slivers, either an unlucky explorer or, perhaps, a scientist involved in experimenting with the creatures, which would be a nice callback to the Riptide Project
In fact, it's due to just how good Sheoldred has been that Rebel Salvo makes this list at all
Differences in market size and import logistics dictate the difference in value between Japanese and English cards
Set Sail on the Dangerous Azurite Sea Disney Lorcana TCG: Azurite Sea continues the story of Illumineers who were last seen celebrating the defeat of Ursula in Disney Lorcana TCG: Shimmering Skies until they were interrupted by chunks of the Great Illuminary, the repository of all stories ever told, falling off and plummeting to the ground
It's left the picture, a.k.a