Old Mastery of Nature
This mod re-adds the old mastery of nature ascension perk, without removing the old one, for when Apocalypse is released later this month and the perk changes. The perk is called Tile Blocker Clearing for clarity and future-proofing.
This mod does not list a version number, but should be compatible with all versions of Stellaris. It may conflict with other mods, however. This mod does also cause a slight graphical bug where there is no icon, but other than that the mod works fine and as intended.
Please start a new game for this mod to take proper effect.