Damien reveals the 'inner sanctum' is a hidden, impenetrable vault beneath the Sterling ancestral estate, used to store the Obsidian Hand's most sensitive information and artifacts, making Isabella realize the terrifying magnitude of what they are up against and how deeply her enemies are entrenched. Damien reveals a faded architectural blueprint, inherited from his grandfather, with a section marked simply: 'The Core. Undisclosed.'

The Vault's Echo