PoE Virtue Corruption: Corrupt a skill gem into a Vaal skill gem

63. Virtue Corruption

Corrupt a skill gem into a Vaal skill gem.

 Vaal Orb corrupts a skill gem, modifying it unpredictably.

Vaal Orb on Gems Effects

• No effect (other than adding the corrupted property).
• Add or subtract one level. Max level gems can exceed their normal maximum this way. A corrupted gem at the normal maximum will not continue to gain experience.
• Add or subtract 1-10 quality. Gems can have up to 23% quality this way.
• Change the gem to its corresponding Vaal Gem.

Each effect has equal weight, meaning there is 1/4 chance on each possible effect. In case the effect of quality or level is chosen, the game will roll to add or subtract the value, each with equal weight.

Chance of obtaining +1 gem level

The chance of a gem exceeding the gem level cap is 1/8 (or 12.5%)

Explanation: Since the chance of any effect is 1/4, there is 1/4 of obtaining the level effect. The game will then roll to add or subtract the value, giving it a 1/2 chance of getting the positive value.

1/4 → 1/2 = 1/8

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