Collapsed Cavern is a Special building buildable by Luthor Harkon and The Awakened, in The Awakening at Tier 3. It is a prerequisite to building the Ancient Vault. It costs 9000 gold and takes 1 turn to build.
To repair his fragmented psyche there are no depths to which Harkon will not sink.
- Miscast base chance: +50% (all characters)
- Winds of Magic power reserve: -10 (all armies)
- Magic resistance: -10% (all armies)