First off, I don't have any mad photoshop skills, so this will look pretty plain. I gets my point across though.

What's the one weapon type we are obviously missing in Destiny? That's right, the grenade launcher. Staple of many a shooter franchise.

Introducing Deuces Wild: description reads "Time to show your hand."

As you can see, Deuces Wild is a double barrel, breakdown style noob tube. I'm imagining this releasing with TTK (which is Hive based). I wanted it to kinda fit the theme of Dragons Breath by having a mid 20th century weapons look. I also imagined something like this on the side.

Stats: Since it lobs grenades (not rockets), I didn't want it to be a OHK(PvP). So I'd set an impact rating such that it does about as much damage as current nades, I'm going with 150 dmg in PvP, and it should kill low level mobs in PvE with one, but need multiple hits for majors/ultras of course. Blast radius would also be more in line with a nade, maybe half of a Rocket. RoF would be same as the fastest RL can fire. Velocity is slow, just slightly faster than throwing a nade, with Stability very high. Reload speed would be medium. 2 round mag, with 8 in reserve for a total of 10.

Perks:

Perk 1: Killing Frenzy - kills speed up reload for a short time
Perk 2: Choice of Javelin (increased projectile speed), Single Point Sling (Faster Weapon Swap), or Speed Reload
Exotic Perk-"Dazed and Confused": "Taking damage from this weapon alters enemy movements". For PvP it will invert the analog sticks for players for 5 seconds. For PvE, enemies will randomly turn, look up or down and fire their weapon for 5 seconds.

This weapon kinda fits the sillyness of some of the more recent exotics without being OP. Its exotic perk is quite useful, but should also provide for some smiles as well. I'm imagining a hive Boomer Knight shooting at the floor while spinning :)