Requires 2 Horadric Lutefisk Cubes, an Aetheric Power Cell, and an Iron Ingot, and you must also have 4 or 5 tinkering skill. You equip it to the crossbow slot, but it cannot fire bolts. It instead uses Lutefisk as ammunition, converting it into an explosive energy beam. It uses 10 lutefisk per shot.
Since this a magic thing and tinkering already has a lot of stuff maybe make it require alchemy or wandcrafting instead
I think it should do something ridiculous, like shoot explosions both behind and in front of you. Or spawn tons of lutefisk for fun.
The idea of a wand-like device usable in crossbow slot is actually pretty awesome. It'd require entirely new weapon type, though, unless it was simply a magical crossbow, which is far less interesting.
It's like Tomes in your hand. They are really just shields with a name override. This new item would just be a crossbow with a type name override. However, using lutefisk as ammunition is impossible. It would just use bolts. It probably would be neat if there were another type of item that could go in the crossbow slot and use custom ammunition instead of bolts. That would allow for a lot of creativity.
How about it being an encrust for crossbows that does one of three things, at random: Lutefisk blast on target Lutefisk blast at user Spawns lutefisk
Also on what skill should make this: duct-taping together something extremely dangerous out of random found parts lies firmly in "tinkering".
