A self-replenishing heart of ice wrenched from the Tower's frozen floors. Frozen Retribution is the best thorns trait in the game.
A heart of endless winter freezes attackers' blood.
How the waterline works. The game counts Frost Core's share of the total crucible: under 10% the trait is INACTIVE; 10–30% it scales linearly (SCALING); 30–35% is OPTIMAL (full 20%); past 35% it is OVERCAP — the trait stays maxed but the extra ores are wasted multiplier.
Exact top-up formula. Adding Δ ores also grows the total N, so the real formula is Δ₁₀ = ceil((N − 10n) / 9) for the 10% line and Δ₃₀ = ceil((3N − 10n) / 7) for the 30% sweet spot — never the naive "fill to 30%".
Worked example. Say your 50-ore crucible already holds 8 Frost Core (16%, SCALING at 15.8%). To max out you need +10 more — landing at 18/60 = exactly 30%. And a tiny 30-ore forge holding 2 Frost Core needs +2 to wake the trait (4/32 = 12.5%).
| Source | World | Chance |
|---|---|---|
| Tower of Hell Wave 12 (T12) | Tower of Hell | 1/404 (0.2%) |
Frozen Retribution applies to armor — these solver picks pin Frost Core at the 30% sweet spot on the best armor of its stage, the Juggernaut Bulwark.
Trait coverage: Frost Core 30% OPTIMAL
Highest score: 5867.2 EHP on Juggernaut Bulwark at 22.7% per forge — the no-compromise endgame recipe.
⚡ Load in CalculatorTrait coverage: Frost Core 30% OPTIMAL
60 ores divides cleanly by 30% — every trait ore sits at exactly the sweet spot with zero rounding waste.
⚡ Load in CalculatorTrait coverage: Dragonsteel 30% OPTIMAL · Aether Lotus 30% OPTIMAL
Built entirely from mined and crafted ores — no Tower of Hell drops or event items required.
⚡ Load in CalculatorEach recipe loads straight into the crucible with ores, RNG lock and target pre-set. Odds are per forge at the recipe's anvil world.
| Ore | Multiplier | Sell | Trait |
|---|---|---|---|
| Voidmother Ore | 23x | $173 | — |
| Nullshard | 22.3x | $167 | 🔥 Null Field |
| Tetrinite | 23.5x | $176 | 🔥 Tetra Barrier |
| Echotite | 22x | $165 | 🔥 Echo Strike |
| Soulfire Ore | 21.8x | $164 | 🔥 Soulfire |
| Dreadstone | 21.2x | $159 | 🔥 Dreadplate |
| Vooite | 21x | $158 | — |
| Abyssalite | 20.9x | $157 | 🔥 Abyssal Carapace |
| Extinctionite | 24.8x | $186 | 🔥 Extinction Wave |
| Infernum Ore | 20.4x | $153 | — |
Frost Core carries a 22.75x crucible multiplier — S+ tier, divine rarity — sourced from Tower of Hell. A crucible loaded entirely with Frost Core forges at exactly 22.75x.
Frozen Retribution caps at 30% of the crucible load: ceil(0.3 × N) ores — 15 Frost Core in a 50-ore forge. At 10% it activates at 14%, reaching the full 20% at 30%.
Tower of Hell Wave 12 (T12) (Tower of Hell) at 1/404.
Frost Core is top-tier forging material: 22.75x multiplier puts it among the strongest ores in the game, and the Frozen Retribution trait makes it a cornerstone of endgame recipes.