Lets you create your own stack or tree of rifts between dimensions. Each rift is a one-way teleportation between dimensions, which by default all require a designated keystone item to be held.
With default settings you can pillar up high in the overworld to make it into the bottom of the End. Or fall from the end to wind up back in the overworld. If you are holding the specified keystone item.
Everything is defined in config, with preset default values. You can use modded dimensions by numeric id in the config file. As well, you can leave the item blank to allow the player to hold anything or nothing and trigger the rift.
Keystone items have a tooltip that change colour when you get closer.
No items or blocks at all are added by the mod