I’ve seen alot of players asking how to get this mod. It is one of the most looked for mod on trading post.
You can only get this mod from mining stone. To increase your chance at getting it, you need luck.
With a full set of 3.5% reinforced luck per piece of armor, +adorned luck on bag, and jewely, food, and house trophy, I can get this mod in under 30min of farming stone.
Note that reinforced luck perk on armor increases with GS, so pieces at lvl 60 can get up to 6% per piece, or something like that. While it’s easier to farm this at lvl 60, i got 2 sliver of adderstone just yesterday in under 30min with the gear/buff build i suggested above.
You can get the luck gear from the trading post for 50 gold a piece, or farm expeditions.