Unlike other planes, Shandalar does not have a fixed location in the Multiverse: it forever drifts through the Blind Eternities, the space between the planes. Abnormally mana-rich, Shandalar is a place where magic flows freely, from the wilds of Kalonia and the kingdom of Thune to the shadows of Xathrid, the peak of Valkas, and the remote Evos Isle. It was once home to the Onakke, an ogre civilization adept at using the plane’s abundant mana to craft artifacts of terrible power. Now the inhabitants of this unusual plane must combat the growing hive mind of the slivers, an ever-evolving race that threatens to consume their world.
Is that the coreset plane then? lol
Yes, the Core Set plane for the current and past, few Core sets (M10-Present).