Pretty straightforward idea. Add this to a deck in the deck builder, and now your deck size is 33 instead of 30. Other deck building rules apply. More cards could mean more power, but it does dilute your card pool. Note that this card would interfere with
Baku the Mooneater
I don't get Rigging Tech. How is it related to stage stuff?
A stage rigger is someone who deals with some of the behind-the-scenes aspects of staging a performance - lighting, scenery, co-ordination, all that stuff with ropes and pulleys you see backstage. It can actually be a super demanding job if you're working in the air, you need to have exceptional upper-body strength.