Toolboxes boost a certain parameter of your spare part depending on the stars the toolbox have,the more the stars,the more points added. You can obtain a Toolbox by opening Supply Boxes. The more Toolboxes you fuse into the part, the more the fuse costs.
A Toolbox with
a magic wand
sticked on front
Magic Toolbox - Increases a part's Magic Bonus. Can be applied to any part.
Applying toolboxes to parts increase in cost the more toolboxes are applied.
The star level for toolboxes also increases the cost, but also increase the boost of health and attack.
Power toolboxes will always give 1 energy no matter the star level, but will continue to cost more the higher the star level. This may cause players to camp for low leveled power toolboxes.
Magic toolboxes will always give 10% Magic Bonus no matter the star level, but will continue to cost more the higher the star level.
Note: It is unknown that when Magic Toolbox will be available again to obtain after the 2018 October All-Stars Event.