Underwater Cities - CardHolder [modular]

A modular cardholder for each player engaged in a fabulous board game: Underwater Cities.

Supplementary elements for each module:
* 4 magnets 8mm (diameter) x 2mm (height) attached to the bottom of the module that allows to holding them together

Modules:
* 7 slots for cards with permanent effect (need more - just print two)
* 4 slots for Action cards + stacked slot for Production cards (just store them there and use at the end of the phase)