Extra Chain is a prefix that turns up on Main Hand, but only on gear tagged arc_bolt. It gives kitChain: +1 to +1 at its lowest step, +2 to +2 at its best — and you need item level 116 before the best one can appear at all.
It comes up at weight 5 when the game rolls affixes, never doubles up with another affix that does the same job (kitChain), and it is what puts Arcing, Forking, Branching, Cascading and Stormforked in an item's name — so you might pick up a Arcing Wand.
No Unique carries it at a fixed number.
Every step
10 steps · lowest to best
| Tier | Needs item level | Gives | Prefix word | Reads as |
|---|---|---|---|---|
| T1 | 1 | +1 to +1 | Arcing | Arcing Wand |
| T2 | 6 | +1 to +1 | Arcing | Arcing Wand |
| T3 | 14 | +1 to +1 | Forking | Forking Wand |
| T4 | 24 | +1 to +1 | Forking | Forking Wand |
| T5 | 36 | +1 to +1 | Branching | Branching Wand |
| T6 | 55 | +1 to +1 | Branching | Branching Wand |
| T7 | 75 | +1 to +1 | Cascading | Cascading Wand |
| T8 | 92 | +1 to +1 | Cascading | Cascading Wand |
| T9 | 105 | +2 to +2 | Stormforked | Stormforked Wand |
| T10 | 116 | +2 to +2 | Stormforked | Stormforked Wand |
Where you will see it
26 bases it can land on