Schematic Exchange a stack at the Tinkerer for a powerful Blueprint of choice.
Sprite Credits: LMaelstrom

Stack limit: 50

Soulbound Soulbound

Fifty of these (one full stack) can be exchanged at The Tinkerer in the Forgotten Craftsmanship quest for one out of 8 blueprints of choice. This quest is repeatable (all blueprints could be claimed if player gathered enough schematics), and changes every two weeks, with items being replaced by the next 8 in a given order. A blueprint is available for every S tier item except for Incubation Mace, and Irradiance Sheath (excluding event reskins).

A variant of this token available from more difficult bosses is the Ancient Schematic.

Items in current rotation are highlighted in green and bolded, and run from Jan 11 (2022) - Jan 25 (2022).
Items in the next expected rotation are highlighted in blue, and should run from Jan 25 (2022) - Feb 8 (2022).

For the first two rotations, the cost of the quest was a 100 schematics (two full stacks) with only 4 blueprints available at a time.