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 exception to this rule was Alina Starkov.
- Alina – Antlers from Morozova's Stag to form Morozova's Collar, the scales from the sea whip to form the Sea Whip's Fetter
- Ivan – Bear claws from a Sherborn bear
- Marie – Seal
- Zoya – Silver bangle
- The Darkling – Himself
- Baghra – Herself
- Malyen Oretsev – Himself
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.