Mutator

Well, the V7 Splicer’s not back, so they had to give you some other off-the-charts wild weapon, right? Meet the Mutator, a dangerous blaster that turns the Chimera virus against the Chimera. It fires a dangerous strain of the virus at baddies, causing them to get infected, collapse and yes, explode. That’s not all it does; you can also alternate-fire clouds of the virus at large groups of enemies to incapacitate them, and the first-level upgrade for the Mutator gives you more power; hit a Chimera here, and it’ll search for its brethren before exploding. The whole explosive part conjured images of Halo’s Spiker, but all the alternate fire goodness was plenty creative.