Board Thread:Off Topic/@comment-38854975-20190905144044/@comment-36926079-20191104045331

Boomerangs were, historically, used as hunting weapons, percussive musical instruments, battle clubs, fire-starters, decoys for hunting waterfowl, and as recreational play toys.- Wikipedia

Normally, I don't like fire, but if it's tradition...

Also, the most viable melee form I can see is if you adjusted the boomerang (slightly) to resemble a Kukiri more. This may cause an issue with the ranged form due to unbalanced forces reducing the amount of force you can throw the boomerang with. On the plus side, it will return on its own.