Three Angel is very visual and looks like CGI. It's not CGI. It is something else that is really easy to control and perform without any practice!
Make the angels magically gather into one corner of the card.
Not only that the magician can return the angels back to their original positions.
Points to remember:

Easy to perform
Preparation explained in detail in video instruction
Quick set up
No elastic thread
No magnet
No flap

The difficulty level of the effect - easy