Every Corruption effect except +25% Accuracy Rating starts locked. When the game corrupts an enemy, each effect that Corruption applies has a 0.2% chance to come from your locked effects, picked evenly among those whose minimum combat level the Monster reaches. An effect drawn this way unlocks when the Monster dies while it still carries the effect.

The game corrupts an enemy only while your Corruption Abyssal Level is above 0, and only a Monster with a Corruption level of its own.

The lowest Monster that qualifies is the best target

A stronger Monster reaches more locked effects, so each of them is less likely. A new character wants +50% Accuracy Rating, found on Monsters with Combat Level 10,000 or more:

  • Petrifying Behemoth (Combat Level 10,293) reaches 4 locked effects. One Corruption draws +50% Accuracy Rating with a chance of 1 in 2,000, and 5,990 Corruptions give a 95% chance.
  • Celesterror (Combat Level 3,501,091) reaches 22, so the chance falls to 1 in 11,000 and a 95% chance takes 32,952 Corruptions.

Open this in Corruption unlocks

Unlocked effects leave the draw

An effect you have unlocked no longer competes. With +25% Global Evasion and Inflict a stack of Laceration per hit. unlocked as well, Petrifying Behemoth reaches only 2 locked effects, and the chance doubles to 1 in 1,000 (2,995 Corruptions for 95%).

Import Save reads which effects your save has unlocked and which ones it has already drawn and is waiting to unlock. When a Corruption applies more than one effect, each one is its own 0.2% roll; set Effects per Corruption to that number.

Corruption unlocks