Beyond the Portal is an expansion for Mini Rogue. Like all Mini Rogue expansions, it also fits in perfectly with the Council (all Mini Rogue elements are compatible with each other).
This expansion contains all 16 Mini Rogue characters (all expansions combined) who have just ventured through a strange portal. Where do they really come from? No one knows, but what is certain is that these alternative versions of the characters you know so well are not quite the same. Skills change, and starting stats can vary as well, giving you different possibilities for playing with those you thought you recognized at first glance.