☰ mtdb > Tricks > Trick< Back to all tricksC4 Permalink: mtdb.co/?C4 Creator: Jonathan Levit C4 is the ultimate color changing card case, in which a case of playing cards changes from red to blue. It is the culmination of years of thought, trial and error, and a goal. The goal was to visibly change the color of a playing card case. But it wasn't just to do that. It was to create a... Buy From: REVIEWS No Reviews Yet. about | login | register | dealers | tricks | creators | contact |