Walter's Medal Enhancement: +10 to +20 with 100% Success Rate
Once your Walter's Medal reaches +10, enhancement from +10 all the way to +20 has a 100% success rate when done at NPC Marche. The recipe shifts at this stage — instead of two matching medals, you combine one medal with an Advanced Enhancement Stone.
Recipes
| Input 1 | Input 2 | Result |
|---|---|---|
| Walter's Medal / Sealed +10 | Advanced [Stone] | Walter's Medal +11 |
| Walter's Medal / Sealed +11 | Advanced [Stone] | Walter's Medal +12 |
| Walter's Medal / Sealed +12 | Advanced [Stone] | Walter's Medal +13 |
| Walter's Medal / Sealed +13 | Advanced [Stone] | Walter's Medal +14 |
| Walter's Medal / Sealed +14 | Advanced [Stone] | Walter's Medal +15 |
| Walter's Medal / Sealed +15 | Advanced [Stone] | Walter's Medal +16 |
| Walter's Medal / Sealed +16 | Advanced [Stone] | Walter's Medal +17 |
| Walter's Medal / Sealed +17 | Advanced [Stone] | Walter's Medal +18 |
| Walter's Medal / Sealed +18 | Advanced [Stone] | Walter's Medal +19 |
| Walter's Medal / Sealed +19 | Advanced [Stone] | Walter's Medal +20 |
Quick Tips
- The 100% success rate means no medals are lost — the only cost per level is one Advanced Enhancement Stone.
- Getting your first +10 is the real milestone; beyond that, the path to +20 is purely a resource investment with no luck involved.
- Even in the +10–+20 range, the failure recovery mechanic still applies: on any failure, you recover the highest-level medal used. Since this range is 100% success, this should never trigger — but it is good to know.
- Stack Advanced Enhancement Stones before starting the +10→+20 run so you can complete it in one session.
FAQ
What exactly is the Advanced Enhancement Stone?
The guide refers to it as "Advanced [Stone]" in the recipe UI. Confirm the exact item name in-game at NPC Marche before purchasing from the Item Mall.
Is the 100% success rate guaranteed by the game or just historically observed?
The official guide explicitly states: "100% success rate for +10 up to +20 with NPC Marche."