Nobody knows which god created a literal cardboard ore. It folds, it crumples, it forges — slightly better than gold.
Ore stats
Crucible multiplier
0.7x
NPC sell price
$5
per ore
Rarity
uncommon
D tier
Found in
Stonewake's Cross
Source type
mined
Trait
None
multiplier filler
Where Cardboardite comes from
Source
World
Chance
Mushroom Cluster
Stonewake's Cross
21.3% (21.3%)
Scrap Heap
Stonewake's Cross
20.0% (20.0%)
Forge odds for Oversized Letter Opener
P(Colossal Sword class) P(Oversized Letter Opener) ▏RNG-lock
Per-forge odds at the Stonewake's Cross anvil without RNG lock. At 50+ ores with RNG Lock on, the class roll is guaranteed and Oversized Letter Opener sits at 35.7% of the variant roll.
Best Oversized Letter Opener recipes at the Cardboardite stage
Cardboardite has no trait — its job is pure multiplier filler. It ranks #20 of 31 non-trait ores in the w1 pool, so the solver reaches for it whenever raw 0.7x beats trait coverage.
👑 God-Roll BiS
Poopite×15
Gearsteel×35
Total ores
50
Multiplier
2.04x
Target chance
35.7% · ~1 in 3
Est. DPS
24
Trait coverage: Poopite 30%OPTIMAL
Highest score: 24.5 DPS on Oversized Letter Opener at 35.7% per forge — the no-compromise endgame recipe.
What is the multiplier of Cardboardite in The Forge?+
Cardboardite carries a 0.7x crucible multiplier — D tier, uncommon rarity — sourced from Stonewake's Cross. A crucible loaded entirely with Cardboardite forges at exactly 0.7x.
Is Cardboardite a trait ore in The Forge?+
No — Cardboardite is a pure multiplier ore. Among non-trait filler ores in its pool it ranks #20 of 31 by multiplier, so it earns crucible slots on raw 0.7x power alone.
Where does Cardboardite drop in The Forge?+
Mushroom Cluster (Stonewake's Cross) at 21.3%; Scrap Heap (Stonewake's Cross) at 20.0%.
Is Cardboardite good for forging?+
Cardboardite is early-game filler: 0.7x multiplier is low, so swap it out once better ores from Stonewake's Cross or beyond are unlocked.