Fluid Armature is a Bonded Item in Torment: Tides of Numenera.
Fluid Armature Description
At first, this finger-length capsule seems to be made of metal. On closer inspection, it is a pellet of quiclsilver contained by an unseen field.
Pressing this capsule into the flesh covers a user in a proctective subdermal layer that somewhat slows reaction times.
Where to Find / Location