I will only describe the 5* portion of the bomb.
Enjoy!
Mechanics: Once you place the bomb down, a radius no bigger than the radius of the OLD shard bombs will appear. If any enemy gets touched by the initial explosion, damage will be dealt. Now, for the cool part. Once the very small radius goes off, five BLUE/YELLOW/RED rays of "mass" or "beams" or whatever will be emitted. These beams will be emitted at random, so you may never know where it hits. So basically, you can call it a "luck of the draw". However, the beams will deal above-average damage (not as much as the Big Angry Bomb) whether it be elemental/normal/shadow or whatnot. I was thinking these beams would resemble the "death rays" at the end of the second Ironclaw Munitions Factory level.
Looks: For the bomb, I was thinking the bomb having an irregular shape and a blue/yellow/red color. The texture is slightly like the nitronome, but it's more jagged and contains a taller shape. The initial blow (small radius) will deal trivial damage, whereas the five beams will deal a more solid, heavier damage.
Distance: The distance of the bomb should only reach out as far as a valiance gun. Or maybe it could creep into the distance of the old shard bombs?
Charge Time/Diffuse Time/Walk Speed: The charge time will be exactly the same as the current shard bombs. The diffuse time is very short, and the walk speed is as fast as walking with a regular blast bomb (not Big Angry Bombs or Irontechs).
That sums it up!
So basically it's a randomly aimed (old) shard bomb with beams instead of crystals. Considering i never used the old bombs before they were altered, I can't say if this is a good idea or not. BUT it would be nice to have some new weapons. I can see players using them complain about the randomness of the beam's trajectory though.