The Sign of Somne is a simple magical sign used by witchers. It is used to put the target to sleep, and may possibly also leave them open to some form of suggestion. An unidentified witcher who strongly resembles Geralt uses this sign in the novel Season of Storms to put Nimue to sleep after meeting her in a forest.
- "Somnus" or "somni" means sleep in Latin.
- This sign was mentioned for the first time in the novel mentioned above and does not feature in any game or adaptation.