Rience

Rience is a mage of considerable skill who is sent after Ciri in the novel "Blood of Elves". In his quest to find her, he captures and tortures Dandelion to get information. If not for the extremely timely intervention of Yennefer, Dandelion might not have survived to continue his role as Geralt's frequent companion.

Yennefer's rescue of Dandelion leaves a permanent "impression" on Rience. While the mage does manage to escape with his life, the sorceress' final spell leaves him permanently disfigured.