I like Rex's idea more, so I'm gonna work off of that instead.
Sex Pistols Requiem is now a full-size, single-bodied close-range power-type that looks like an ordinary Sex Pistol, albeit with the proportions of Mista. The number on its forehead is 4, signifying Mista resigning from attempting to control his fate. By letting go of his paranoias and allowing his life to steer him in the right direction, he weaponizes the misfortune that he used to fear.
Sex Pistols Requiem gains the ability to manipulate the concept of fortune and misfortune, allowing it to alter the probability of events occurring by imbuing Mista's bullets with chance-alteration properties. In a sense, he gains bullshit plot armor which allows him to trigger events that would've been realistically impossible otherwise (say, causing the ceiling to collapse by shooting it and striking a weak point in the foundation or killing someone instantly by shooting them at just the right angle that one of their ribs is dislocated and punctures their heart).