Amplifiers are objects that increase a Grisha's powers. They usually consist of bones, scales or teeth of animals, though humans such as The Darkling and Baghra have been known to be living amplifiers. Only the Darkling's most favored Grisha possess amplifiers. Most Grisha are only allowed to have one amplifier. The only exceptions to this rule were Alina Starkov and Zoya Nazyalensky.
- Alina Starkov – Antlers from Morozova's Stag to form Morozova's Collar, the scales from the sea whip to form the Sea Whip's Fetter, the Firebird which turned out to be Mal.
- Ivan – Bear claws from a Sherborn bear
- Marie – Seal
- Zoya Nazyalensky - Silver bangle studded with tiger teeth (formerly); two black scale bracelets from Juris' scales
- The Darkling – Himself
- Baghra – Herself
- Malyen Oretsev – Himself
- Tolya Yul-Bataar and Tamar Kir-Bataar - Shark Teeth (unknown if from same animal)
- Genya Safin - Kestrel Feathers
- Ilya Morozova's second daughter
- Living amplifiers also have the ability to detect Grisha power in a person through touch. However, a Grisha wishing to hide their power can block this ability with a layer of paraffin wax between themselves and the amplifier.