The Golden Vault is a reliquary-shrine of the Ten Thousand — gold-chased plate, dormant Auramite, and the regenerative machinery of the Throne's own forges. A Custodian that ends its activation within 3" of the Vault and is not in melee repairs one lost Wound; a Brute repairs one Wound, but no more than once per game. The Vault cannot restore a fighter already Out of Action, and only friendly Custodes fighters draw anything from it — the shrine mends only the gold it was raised to serve.
Codex · Adeptus Custodes
Terrain2
The Null Pylon is a black monolith of Pariah-gene alloy, a silent pylon the Sisterhood raises where the warp runs too close to the world. While a Sister of Silence is within 3" of the Pylon, her Silence extends to 12" instead of 9", and any enemy Psyker that begins its activation within that field suffers Perils of the Warp on any double it rolls that activation — not merely on a failed Wyrd test. Where the Pylon stands, the witch's craft is not only smothered but made a danger to the caster itself.