I mean, it doesn’t have to be called “Onyx Blaster MK II”. Steelyx Blaster lol It can be a spiritual upgrade to the Onyx Blaster without using the base weapon in the crafting recipe, just like how the Magic Missile, Flamelash, and Rainbow Rod are unrelated by crafting.
If it’s going to be an upgrade to the Onyx Blaster, spiritual or not, then you should also consider the Onyx Blaster’s best traits, which are:
-insane damage per shot.
-relatively low spread for a shotgun.
-innate crowd control.
I’d prefer a weapon that capitalizes on those strengths, rather than just a snowman cannon taped to a laser machinegun. For example, I was thinking it could be a bullet version of the Tsunami, but one that also creates afterimages (similar to luminite arrows) that explode.