Runescribe
The Runescribe is a town NPC that creates inscribed runes from equipment.
How It Works
Place 5 pieces of equipment, dried essence, and a blank rune. A random modifier is picked from the equipment pool and inscribed onto the rune. All 5 pieces of equipment are consumed in the process.
Take the inscribed rune to the Blacksmith. It replaces one modifier on the target equipment with the inscribed one.
The runescribe cannot extract modifiers from wooden or leather armor, excluding bows and crossbows.
Modifier Selection
The modifier is chosen from all modifiers across the 5 items. Worse modifiers, like negatives and commons, are more likely to be picked than rarer ones.
Duplicate modifiers across items significantly boost that modifier's odds. If you want to target a specific modifier, consider bringing in two or more equipment pieces with it.
Higher tier blank runes shift the odds towards rarer modifiers.
Constraints
Every inscribed rune receives a constraint that limits which equipment material it can be applied to.
Exact odds are previewable on the action button in the Runescribe GUI.
Tips
If you wish to extract a modifier from low-tier gear and not have it be constrained to a low-tier material, surround it with equipment of higher-tier materials. For example, if you have a good modifier on a copper item and put four golden items next to it, you'll have a higher chance of that modifier being picked with a gold constraint.
Matching equipment materials increases the chance of getting that material as a constraint.
If the same modifier appears on multiple items, its odds are boosted significantly. Three copies of a modifier is much better than three different modifiers.
Items with fewer modifiers add less noise to the pool. Pick filler items that don't introduce unwanted modifiers or constraints.
Low-rarity modifiers on items dilute the pool significantly. Use cleansing runes beforehand to remove them.
Higher tier runes shift the odds towards rarer modifiers. Save your best runes for strong equipment pools.
Equipment of any durability works, so recycling nearly-broken gear is often a good idea.