An essence skips the steps
An epic essence laid on a common tool makes it epic at once, without going through uncommon or rare. It only ever raises: a tool already epic or better refuses it.
direct rarity
The Catalyst raises rarity. An essence lifts a tool to its own rarity in one go, and two items of the same rarity, two essences or two twin tools, fuse into a single one of the next rarity. Every fusion is paid in perfect prisms, the dearer the higher the step.
An epic essence laid on a common tool makes it epic at once, without going through uncommon or rare. It only ever raises: a tool already epic or better refuses it.
direct rarityTwo essences of the same rarity, or two tools of the same name and quality, give a single item of the next rarity. Each step has a price: 2, 5, 15 then 40 prisms.
2 into 1In a tool fusion, the first one named survives: its id, its modifiers, its enchantments. It takes the higher temper of the two, capped by what its new quality allows.
the first survives
Uncommon
Rare
Epic
Legendary 




× 6→
× 3
× 2→
× 1
| Target quality | Prisms per fusion | Max temper | Common items to get there |
|---|---|---|---|
| Common | starting point | 3 | 1 |
| Uncommon | 5 | 2 | |
| Rare | 7 | 4 | |
| Epic | 8 | 8 | |
| Legendary | 10 | 16 |
The last column counts what a climb from common costs through fusions alone: 16 identical common tools for a legendary, and 2 × 8 + 5 × 4 + 15 × 2 + 40 = 106 prisms on the way. A legendary essence does the same in a single application.
| Achievement | What counts | Tiers |
|---|---|---|
| Essences applied | each essence laid on a tool | 1 · 10 · 50 · 200 · 1,000 |
| Essences fused | each essence fusion, one per pair | 1 · 10 · 50 · 200 · 1,000 |
| Chain fusion | the most fusions in a single command | 5 · 20 · 50 · 100 |
| Legendary essences | each fusion that gives a legendary essence | 1 · 5 · 25 |
| Tools fused | each tool fusion | 1 · 10 · 50 · 200 |