The Witcher 3: 10 Rare Weapons You Totally Missed
4. Viper Venomous Sword
Remember that bit about the Harpy Sword being the most powerful silver sword?
This is the sword that knocked it off its perch.
The Viper Venomous silver sword is part of the Viper Venomous Witcher set, all of which are missable items that can be obtained during various parts of the Hearts of Stone questline.
There's both a steel and silver version of this set, however the silver sword is much rarer.
While the steel version can be found early on in Maximilian Borsodi's vault, the silver sword requires you to go through the entirety of the Hearts of Stone questline... and once again side with Olgierd.
God, CDPR must really love him.
The silver sword is acquired in complete form from Master Mirror's own dimension during Geralt's final battle against him, where it can be pulled from a stone protruding from the ground. This has to be done before defeating Gaunter, or the sword is lost forever.
It's more than worth it, though. As well as having excellent base damage, the sword also grants bonus xp from killing monsters, and a boost to critical damage.
It's undoubtedly a worthy weapon to take players into the Blood and Wine expansion, though more on that later...