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.
Look at the usage numbers on those column 3 and 4 perks. Perfectly balanced... just like this middling sword.
It has Relentless and Whirlwind, but every sword and their mother has that. You also have Valiant Charge for lunge memes and Flash Counter for debuff shenanigans, but overall its going to be outclassed by other blades. In PvP it has a leg up thanks to Valiant Charge, but that also rolls on better swords that can also get Tireless Blade, and its certainly no Eager Edge. Field Forged has interesting applications, but it also takes quite a bit of effort to build up to a level that can't be replicated by a Lucent Blades mod or two, and its Guard Resistance buff isn't worth all that much.
Overall, its a perfectly average Arc sword. I would strongly advise looking elsewhere if you want a standout Arc sword with which to do battle against the forces of Darkness/your fellow Guardians. Like Half-Truths. Half-Truths is great. I'd recommend you go use that if Valiant Charge and Flash Counter don't interest you.