From October 2015 patch notes.
Equipment: 4- and 5-stat gear!
- Corrupted gear is now available. Use a corrupted piece of equipment on a corrupted stone to increase its corruption level.
- The corrupted piece of gear can hold 4 stats at level 1000, and 5 stats at level 2000 (the current max).
- 4-stat corrupted gear has a minimum level of 120, and 5-stat level 160.
- 1 stone adds 10 levels from 0 to 1000, and 4 levels from 1000 to 2000. This means you need 100 stones for a 4-stat piece, and 250 more for a 5-stat piece.
- You can weld and orb onto a corrupted piece, but can't weld anything off. So you can weld a single to a tri-stat without orbs, as long as the tri didn't already have the stat from the single on it already.
Corrupted Items
- Corrupted items: amulet, rings, cape, belt, and boots.
- Weekly quest: "A Demonic Appetite":
Archie has been living in Aston for some time, but it's hard for an arch demon to get used to living in the (human) city. While he has just gotten his shop remodeled, he still doesn't quite feel at home. Cheer him up by bringing him 3 of his favorite demon foods and he will reward you handsomely - with a piece of corrupted equipment.
Talk to Archie in his shop next to smugglers to get started (you will still receive the items even if you don't speak with him). The following 3 demonic food/drink items are unique and you can only obtain 1 of each at a time:- Brimstone Brew - Teufelheim: random reward for turning in rat points (% chance = rat points / 1000). Obtained along with item or whatever other reward you got.
- Demon Chili - Jobbington: 5% to obtain when doing jobs over difficulty 400 (~level 125). Chance increases by 1% for each daily mission completed that day.
- Hell Apple - Governor: Chance to obtain when completing a mission for 800+ demons in hell pents or higher (i.e. 104+). Chance = (100-(1000-demon kills)/2)%. 802 mission = 1% chance, 900 mission = 50% chance, 1000 mission = 100% chance, for those of you that don't like math.
Go to Archie and say "trade <item>" to make the trade. This quest is repeatable once a week (resetting Mondays at midnight GMT).**The /autocorrupt command, available to donors, automatically uses corrupted stones that drop from demons. Set the slot with "/autocorrupt ring" etc, you can also set it to any of the first 4 slots in your inventory "/autocorrupt 1-4".