It's really satisfying to bank the shot die off a 3 into another 3, so the 1 starts a chain and then the two 4s become a 5, but sadly the auto-aim of the dice bounces tends to miss if the merging dice had momentum? So there aren't that many other cool trickshots you can do that are better than just picking a regular merge chain to do with the shot die.
Artifact idea: Cannonball: turns your die into a fast and heavy iron sphere that does not merge and just pushes the dice around.