i've toyed with a lot of ways to have attachable sigils on irl inscryption cards, but unfortunately the "best" isn't the best.
want to make your own ligma card?
https://generator.cards/
want to get your own printable pdf's of the cards?
https://cards.vladde.me/
the idea for slit on laminated cards came from:
Dextorg, https://youtu.be/WktbcZx5djg?t=588
music used:
Old World Saga - Hanu Dixit
Streets Of Punjab - Hanu Dixit
Calm Cam - TrackTribe