Celestial is the flagship cosmic event mutation at 120×—one of the largest environmental multipliers in mutations.ts, stackable, and distinct from growth tiers like Rainbow. Traders screenshot it because the number is real, not because it multiplies other env tags.
mutations.ts: rare cosmic mutation from meteor showers and blood moons. weather.ts lists Celestial on Meteor Shower (with Starlit, Void), Blood Moon (with Bloodlit, Corrupted), and Aurora Borealis (with Aurora, Rainbow). No community proc-rate tables are in the repo.
Weather tie-in: Meteor Shower · Full mutations guide
Celestial is event-category, stackable, environmental. Sell path: growth × [1 + (sum env − count)]. Solo Celestial → 120. Celestial + Starlit (24×) → sum 144, count 2 → 143. Celestial + Bloodlit (35×) → 154 after the same pattern. Do not treat 120 × 24 as the stack. One growth mutation only. Celestial has no CONFLICT_PAIRS entry.
Grow a Garden mutation calculator · Crop value calculator · Mutations list & multipliers guide
Celestial applies a 120× multiplier in the event bracket. The table below shows the value it adds to a reference crop (base 50) across common harvest weights, so you can gauge how much this tag is worth before chasing it.
| Weight | Base crop value | With Celestial (120×) | Value added |
|---|---|---|---|
| 1 kg | 50 | 6K | +5.95K |
| 2 kg | 200 | 24K | +23.8K |
| 5 kg | 1.25K | 15K | +149K |
| 10 kg | 5K | 6K | +595K |
Meteor Shower, Blood Moon, and Aurora Borealis all list Celestial among bonuses. That does not mean three different Celestial strengths—mutations.ts fixes the multiplier at 120×. Which weather is active only explains how the tag arrived.
Rainbow can appear as an Aurora Borealis bonus while also being a growth-category mutation. If Rainbow is your growth tag, it occupies the exclusive growth slot; Celestial still sits in the env bracket. Mega and Tiny remain mutually exclusive growth-adjacent rules when those ids are in play.
Cosmic (95×) and Void (75×) are frequent related event tags. Two or three of them on one crop means a large sum and a count equal to the number of env icons—then 1 + (sum − count). Multiplying Celestial × Cosmic × Void invents a value the formula never uses.
Plant for maturity inside a documented celestial weather window, harvest with tags visible, and resolve growth separately. Celestial never blocks Wet or Ember; only the listed conflict pairs do.