Kalkstein

Kalkstein is an alchemist Geralt deals with throughout The Witcher. His first job comes in Act I on the road to Vizima, with The Ghoul Contract, where he pays for ghoul blood to use in his research. In Act II, in Vizima’s Temple Quarter, he offers The Alghoul Contract as well.

Kalkstein also becomes a suspect in the hunt for Salamandra. In The Crown Witness, a dying prisoner whispers his name, and Vizima Confidential and Suspect: Kalkstein follow up on clues that tie him to Azar Javed. To win his trust, Geralt takes on A Mysterious Tower, finding two rare books about a mage’s tower in the swamp. Kalkstein rewards him with a Sephirah, and in The Sentry he is the one to talk to about the Tarot card that shows how to beat the golem guarding the tower. He also hands over the book reward for Berengar’s Secret.

In Act V, in Old Vizima, Kalkstein explains during Sweet Revenge that a strange monster Geralt killed came from Salamandra’s experiments with the stolen witcher secrets. He asks for items to make an armor in A Magic Formula, and posts The Garkain Contract and The Wraith Contract for his own experiments.