Catalyst

>catalyst

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.

Command
>catalyst
Essence
direct jump
Fusion
2 into 1
Currency
prisms
Ceiling
legendary

What sets it apart

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

Two for one, and prisms

Two 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 1

The kept tool keeps everything

In 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

Apply an essence

essence by row, tool quality by column
CommonUncommonRareEpicLegendary Uncommon Rare Epic Legendary
+
Epic
+2 steps at once, instead of 4 tools and 25 prisms. Max temper 5 → 8
>catalyst apply 1 42

Fuse essences

two essences give one of the next rarity
Prisms30
From
Scope
Uncommon 7 -6
Rare 1 +1
Epic 0 +1
Legendary 0 =
× 6→× 315× 2→× 115
>catalyst fuse essence uncommon all confirm
4 fusions
30 prisms, 0 will be left
Stopped: not enough prisms left.

Fuse tools

click the tool to keep, then its twin
Click the tool to keep (A)
Prisms20
#12 keptUncommon, T3
+
#15 sacrificedUncommon, T5
=
RareIron Pickaxe #12, T5
Two distinct tools
Same tool
Same quality
Not legendary yet
None protected
Enough prisms
#12 keeps everything and takes temper 5 from #15. #15 is gone, 5 prisms.
>catalyst fuse 12 15

Costs

by target quality
Target qualityPrisms per fusionMax temperCommon items to get there
Commonstarting point31
Uncommon252
Rare574
Epic1588
Legendary401016

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.

Achievements

the Prism Echoes
AchievementWhat countsTiers
Essences appliedeach essence laid on a tool1 · 10 · 50 · 200 · 1,000
Essences fusedeach essence fusion, one per pair1 · 10 · 50 · 200 · 1,000
Chain fusionthe most fusions in a single command5 · 20 · 50 · 100
Legendary essenceseach fusion that gives a legendary essence1 · 5 · 25
Tools fusedeach tool fusion1 · 10 · 50 · 200

Other stations

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