Upgrade stones

Upgrade stones raise the upgrade level of a piece of equipment. Each level gives a bonus by the kind of item (see Upgrades).

Stone	Stack	Price	Where to get (besides monsters)
Spens	200	50,000	Quest reward: Pack 15, Pack 15, Pack 26, Pack 26, Blacksmith Hunt, Shirley' Truth
Sr Mitchell Stone	200	100,000	Quest reward: Pack 9, Pack 10, Pack 12, Pack 15, Pack 9, Pack 10, Pack 12, Pack 15, Pack 25, Pack 25, Lost Item, Find Pei Lihan, Shirley' Truth, Metal Collecting, Weapons Merchant Quest
Yiterni Stone	200	200,000	Quest reward: Pack 10, Pack 11, Pack 12, Pack 15, Pack 10, Pack 11, Pack 12, Pack 15, Pack 27, Pack 27, Lost Item, Find Pei Lihan, Cruel Tizer Tooth, Pyrocker's Foresight

Upgrading

• An upgrade takes the item, the stones the level needs and gold: the item's maximum durability × its price / 200. The stones and the gold are spent whatever the outcome.
• On success the item gains a level and its price grows by 10%. On reaching an even level it also gains a socket; helmets, head armour, rings and necklaces gain one on every level.
• On failure the item goes back to level 0: it loses its upgrades, its gems and the sockets the upgrades added.
• From level 6 an upgrade can also break the item, which becomes a piece of Iron.
• Helmets, head armour, rings and necklaces stop at level 5; other items at level 9.

Chance of success with each stone (a dash: the stone does not work at that level):

Level	Spens	Sr Mitchell Stone	Yiterni Stone	Breaks	Stones needed
0 → 1	80%	90%	100%	—	3
1 → 2	70%	80%	90%	—	6
2 → 3	60%	70%	80%	—	9
3 → 4	—	50%	70%	—	3
4 → 5	—	40%	60%	—	6
5 → 6	—	30%	50%	—	9
6 → 7	—	—	20%	40%	3
7 → 8	—	—	10%	70%	6
8 → 9	—	—	5%	85%	9

An upgrade succeeds with the chance shown, breaks the item with the break chance, and fails otherwise.