The Mass Self-Aid Kit motivates or polishes ALL special, production, or residential building to double its production for one collection (for special and production buildings, this can be done even after production finishes)
The Self-Aid Kit and Mass Self-Aid Kit were introduced with the 2017 changes of the Guild Expeditions.
On 18th Feb 2018 (BETA), the Mass Motivation Kit was revamped into the Mass Self-Aid Kit. This now enables the player to motivate or polish all buildings of his/her city. THIS WORKS EVEN AFTER PRODUCTION FINISHES (on production buildings).
Fragments can be collected via Nutcracker Guardhouse