All currency can be used to change an item somehow. They are, in sort of roughly tiered:
- Scrolls
- Transmutation Orb - turn white item magical (adds 1 or 2 affixes, randomly).
Augmentatoon orb - add a random affix to a magic item, giving it it’s max of 2. Cannot be used if an item has 2 affixes.
Alteration orb - reroll a blue item. Can go from 2 -> 1 affixes, or 1-> 2.
Affixes have tiers. The minimum health roll, for example, is 3-9 or something. The max is 81-100, for some types of items. The tier you can roll is capped by the item level of the item. So higher ilevel items = better potential. But you can roll shit tiers e4ven on high level items.
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Chromatic orb - reroll socket colors.
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Jewelers Orb - reroll # of sockets on item.
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Chance orb - turns a white item into a “random rarity”. This can be magic (blue), rare (yellow), or unique. In descending order of probability. The only way you can get uniques is when chancing the base item a unique is. E.g. Occultists robes can turn into 1 of 2 unique chest pieces. One of this is GG endgame tier. Also rare to get that via chance :P
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Fusing Orb - reroll # of links on an item.
Alchemy Orb - turns a white item into a rare item. The rare item will have 3-6 affixes, randomly, and the # of affixes is “rerolled” when applied. So you can go from 6 to 5 or 4 or 3. And vice versa. Note that items can have at most 3 prefixes and 3 suffixes.
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Chaos orb -rerolls all affixes on a rare item. Can change the tiers of affixes.
Blessed orb - rerolls the implici mod of an item only.
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Regal orb - Turns a magic item to rare by adding an affix at random. Existing affixes are unchanged.
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Divine Orb - rerolls the values of all affixes on an item. Can re-tier affixes. The type of modifier is unchanged. So if you have the item with perfect affixes (say a 2h axe with +% physical damage, attack speed, + flat physical damage, leech, and shit I don’t know what you would want for physical. Let’s say added lightning damage and added cold damage, for gigles), you can use divine orbs to reroll the values but keep those mods. Of course, you can roll across any tier, so it’s only somewhat less hectic than using a chaos to reroll a rare. Which you should not be doing.
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Exalted orbs - adds an affix to a rare item, to a max of 6. This is a way to upgrade “incomplete” rarities.
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Mirror of Kalandra - makes a copy of an item.
I’ve listed these in rough order of rarity. You get Trans and alt shards by vendoring magic/rare/unique items. Also alch shards, but this is very rare. There are other important orbs (one each for adding quality to weapons, armor, flasks, and maps scouring removes non locked master crafted affixes from an item, regret give you a passive respec point), but never mind.
If you wanted to start with a horde of say Alts or Trans and work up to Jewelers or Fusings, you wouldn’t go through each successive currency exactly. It’s sort of weird. You shouldn’t be trading up for currnecy this way until you have high level masters(who each sell discount currencies).
Trading on the player market revolves around Chaos and Ex. A piece of gear you get for 1 chaos is frequently good enough to use in high level maps assuming you have other, stronger gear in some parts. Sometimes people chard alchs or fusings for items, and these usually trade in the 2:1 Alch/Fuse : chaos ratio range. Regals usually trade for chaos 1:2. As I mentioned earlier right now the Chaos:Regal ratio has gone bananas.
Chaos are used at high level to reroll ambush strong boxes (certain ones), reroll rare maps, and pay for master crafted map mods at Zana (Zana can run any map with a special mod added for a cost of chaos. it gets expensive but can be worth it. Most previous challenge league types are available this way. E.g. Beyond has enemies appear from another dimension as you slaughter regular monsters in a map. They are much tougher, but the drop potential is good). Oh, and pay for high level master crafting stuff. Nothing in master crafting costs more than chaos.
Your jeweled orb count will infalte as you go up in levels once 6-socket items start dropping. These vendor for 7 Jewlers. And you should be doing that (rolling a 6-link item is hella hard, btw) in most cases (for white items. If it’s blue or yellow you need to stop and think). Chaos are gained starting level 60 by vendoring the chaos recipe, but do drop before them. The chaos recipe turns to the regal recipe with ilevel75 items.
Fusings are not common, so one thing people have to do is farm up/trade up and then trade for fusings to make 5l and 6l items if they don’t trade for such items outright.