Blood Bowl / Blitz Bowl base with inserts for two magnets:
Square 5x2mm in the center for transportation
Round 3x2mm center front to hold a magnetized ball
I recommend to glue in the magnets in reversed polarities, so the ball will not get stuck on the center magnet.
The base also has a small indicator where the spot for the ball is.
The author marked this model as their own original creation.