Potion "Wormhole" destroys the walls around the dungeon core.
Windows 10 64 bit, 8 Gm RAM, Intel(R) Core(TM) I7-4500 CPU1.80 GHz 2.40GHz GPU: AMD Radeon R7 M265, Intel(R) HD Graphics Family. Version game fresh, 1.5.2f4
Potion "Wormhole" destroys the walls around the dungeon core. Potion "Wormhole" functions as a ritual "Armageddon".

War for the Overworld Launcher Log.txt
Game Version:
Steam Public
Platform:
Windows
This is intended behaviour from a balance pass a while ago. Not a bug.