Barovian Silver Rapier

Standard Silver Properties
As a silvered weapon, it bypasses the damage resistances and immunities of creatures that require silver to damage (werewolves, certain devils, and other silver-vulnerable creatures). Standard rules apply; it does not ADD damage, it just allows those types of creatures to be harmed.

Barovian-Specific Properties
Warding Notation
The marks worked into the guard are both functional and traditional. Once per day, when the wielder is targeted by a charm or fear effect originating from an undead creature, they may add their proficiency bonus to the saving throw as a reaction. This doesn't require attunement . The notation works for anyone holding the weapon, which is intentional. Barovian smiths made these weapons for anyone who might need them, not for chosen heroes.

Nightwood Core
The nachtholz grip does something to the weapon's relationship with the dark. The wielder has advantage on Dexterity (Stealth) checks made specifically to conceal the weapon on their person — the blade doesn't catch light the way most metal does in darkness, seeming to absorb it instead. Additionally, the weapon produces no sound when the slide of the blade on the scabbard is completely silent, regardless of the scabbard's material.

Barovian Silver Alloy — Cold Burn
The local ore component in the alloy reacts specifically to vampiric and lycanthropic tissue in a way that standard silver doesn't. When the weapon deals damage to a vampire, vampire spawn, werewolf, or creature with lycanthropic infection, it deals an additional 1d4 cold damage. This cold damage bypasses resistance — the cold isn't elemental, it's something in the local silver that the smiths don't have a name for and don't need one. It just works.
Against Strahd specifically — or any vampire lord of equivalent age and power — this additional damage increases to 1d6, and the target cannot use Legendary Resistance to automatically succeed on a saving throw caused by the wielder until the start of the wielder's next turn after the hit lands. The silver knows old blood from new.

Not Yours
There is the crest of Castle Ravenloft upon the hilt, denoting a time when the land was committed to protecting itself from monsters, not a home for them...
When a vampire or vampire spawn attempts to use their Charm ability on the wielder while they are holding this weapon, the DC of the resulting saving throw is reduced by 3. The symbol isn't a ward exactly — it's more like a reminder, worked into the metal by generations of smiths who understood that the first thing the dark tries to take is your sense of who you are. The pommel sits in the palm. The symbol presses against the skin. Not yours. A small persistent truth in the hand.

Proficiency with a Rapier allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Damage: Melee Weapon Attacks, Damage: Cold, The weapon does not require attunement in its base form everything functions the same for any proficient wielder. However, a wielder who spends a long rest in Barovia holding the weapon during sleep, allowing whatever is in the Barovian silver to acclimate to their blood, can attune to it. Attuned wielders gain one additional property: Blood Knowledge: Once per short rest, the attuned wielder can press the blade flat against their palm — dealing 1 piercing damage to themselves — and learn the exact current location of the nearest vampire or lycanthrope within one mile, as well as a rough sense of their emotional state. The silver tastes the air and knows. This property was not designed by any smith. It developed on its own, in the metal, over generations of use against the same kinds of creatures in the same dark country. Barovia teaches its weapons the same way it teaches its people: by making them survive., Damage, Combat, Finesse, Vex