In December 2007, Amalric was one of the many Shadowhunters captured by Sebastian Morgenstern and forced into drinking from the Infernal Cup, promptly turning him into a Dark Shadowhunter. However, Amalric was injured the same night as the attack on the Institute and was left there. He was later found by the others who came to investigate. His body was brought to the Basilias, and his family was told about what happened to him.
When his presence was brought up during a Clave meeting, Diana Wrayburn demanded to at least know his name. In hopes of finding a way to reverse the effects of the Cup and save the Endarkened, the Silent Brothers tried to study him, to no avail.
During this time, though he was barely conscious, he went through a terrible amount of suffering. A few days after Jace Herondale saw him in the Basilias, the Brothers finally tried to make him drink from the Mortal Cup and Amalric died instantly. His corpse was then sent to the Spiral Labyrinth. The warlocks there tried to examine his body but only found his heart shriveled and his organs desiccated.
- City of Heavenly Fire (first and only appearance)