Linear
Each extra stack adds the same flat amount as the previous one.
Quick Guide
Stack Type Legend
Stack Type explains how duplicate copies of an item scale. The wording below is simplified for quick reference.
Hyperbolic
Each extra stack still helps, but with diminishing returns as it approaches a limit.
Reciprocal
Uses inverse-style scaling, usually making each added stack change the value less than the one before.
Linear Reciprocal
A reciprocal-style formula with a steady per-stack change to the numerator or denominator.
Exponential
Each extra stack multiplies the effect instead of just adding to it.
Special
Uses a unique item-specific formula instead of one shared stacking rule.
None / -
No real stacking behavior, or the extra copies do not change the listed effect in a normal way.
Boss-specific labels like Aurelionite, Beetle Queen, Stone Titan, and similar names in this list mean the item uses a source-specific or boss-specific rule rather than one general stack formula. Reference: Item Stacking and Items .