more interesting precursor tablets

Hi,
I have an idea for an interesting type of precursor tablet:
The tablet would apply to a specific terrain type and change both map nodes and the pathing between them. Its a little like finding a map of an area and then terraforming a part of the atlas into that. Some examples:
-a tablet that applies to the mountain region, it creates a straight line path of connected nodes that feature increasingly hard bosses
-a tablet that applies to the forest region, it creates a fairy forest and removes all connections between nodes, instead when you clear a node at the entrance of the forest, it will create paths to the next node within the forest, this way step by step a labyinth like path layout is revealed, in the center of the fairy forest is a unique map, all maps within the forest are forest and fairy themed with fitting mobs and whisps
-if you brick a map, that can prevent you from progressing through the rest of the special region, e.g. not reaching the last boss or unique map in the examples above