This card holder for the game Codex ensures that the card stacks are perfectly aligned on top of each other, preventing anyone from guessing the next card. Fairness and suspense are maintained—delivering an optimal gaming experience. The cards rest at an angle in the holder, making it easy to draw the top card. The insert has a hole for a magnet 5 mm in diameter and 10 mm in length, and the lid features a 7 x 7 mm recess for a metal plate. The magnet and plate system is optional.