Q: What are masterwork rolls?
A: Most legendary weapons are capable of being Masterworked. The masterwork system is a way for you to upgrade your favorite weapons to their maximum potential.
Q: What does it take to upgrade a weapon to a masterwork?
A: Upgrading your weapons, in broad terms, takes a small amount of glimmer, legendary shards, and, most importantly, Enhancement Cores.
Depending on what Tier your weapon is at, the requirements to raise it to the next tier increase the closer the weapon is to being fully masterworked (Tier 10).
Q: What benefits do I get for masterworking a weapon?
A: Each tier that you increase your weapon will grant a small buff to a single stat, chosen randomly when the item drops.
Beyond that, at Tier 5 you gain access to a kill tracker. At Tier 10, your multi-kills will generate orbs of light.
Q: So what are these "masterwork roll" stats?
A: These are the possible stats that upgrading your weapon will grant a bonus to. Depending on what tier you are at, you can grant anywhere from 1-10 additional points in any of the stats listed to your weapon.
Q: Any catch with this?
A: The Bungie API currently says that all weapons can potentially roll with all stats as their masterwork stat. This obviously isn't accurate, as Blast Radius isn't applicable to, say, Auto Rifles.
The list you see on this page is trimmed to only show stats that actually appear on the weapon. However, it is possible that Bungie has additional logic behind the scenes that further filters these
possibilities to, for example, prevent certain items from being able to have an Impact masterwork. Until Bungie modifies the API files to 100% accurately display which masterwork stats are possible on
each item, take what you see here with a pinch of salt.
EDIT: So... I'd written that review before I finally got one. I waited until I filled my Engrams so my Ghost stat mod would apply (stupid that I have to do that, but besides the point). Now that I have it...
Dear LORD these are amazing. I thought that the kill requirement to refresh would be a hindrance, but it's actually amazing! Before, I had to ensure that I was dodging and throwing my Smoke Bomb constantly to keep Heart of the Pack up (I'm just going to call this buff HotP for convenience), but now I only need to dodge once and then play as I normally would. The buff lasts for 15 seconds which is more than enough time to get even a singular kill to keep things going. This thing is amazing.
After Nightstalker 3.0 dropped, my biggest gripe with the subclass was that it felt like it was exactly what it was before, but with a worse Quiver (Yes, I believe the old utility of literally coating the entire battlefield in Tethers is better than what we have now) and practically zero control over your guns, which really stung considering HotP giving me masterful control over my entire arsenal at all times was what made me a Nightstalker main for the entirety of Destiny 2 up until Witch Queen. The only "control" over weaponry that Nightstalker 3.0 has is that one Fragment that reloads your equipped weapon on Suppressing something which is honestly just a waste of a Fragment most of the time. I know a lot of people like Gyrfalcon's and believe me, I do think that it's pretty good, but again, it just comes back to the lack of weaponry control. Gunslingers have On Your Mark, Revenants have Whisper of Impetus, Arcstriders have Flow State, and Threadrunners have Thread of Ascent, all of which feel better than using a Suppression Grenade (though Two-Tailed Fox has a good interaction with that Fragment I will admit).
Then in comes this Exotic. Usable on all Subclasses and honestly just downright amazing. I used it with Nightstalker to try it out and genuinely got chills up my spine because of how much it felt like I was playing old Nightstalker. I've spent the past year and some change almost actually never playing Nightstalker unless there was a very good reason to, which honestly most of the time there wasn't compared to other options. Now, with this? I think I'll remain a Revenant main, but after Volatile Flow goes away, I think I'll finally have a reason to dust off my old uniform from time to time.
IMPORTANT NOTE: Teammates cannot refresh the timer themselves, only the Hunter wearing the Exotic can, which is pretty annoying but I guess understandable, especially given that it refreshes other people at the stack you're currently at.