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In Path of Exile 2, Vaal Orbs continue to be a high-risk, high-reward crafting currency used to corrupt items. When used on Unique items, the outcomes are distinct from those applied to rare or magic gear, and each has exactly a 25% chance of occurring. Below, we break down each possible result when using a Vaal Orb on a Unique item—along with the underlying mechanics and hidden complexities.

1. No Change – 25% Chance

This is the safest and most neutral outcome. The item becomes corrupted, preventing any further modification, but nothing else changes. This includes:

• No added modifiers.
• No stat or socket changes.
• No visual difference beyond the corrupted tag.

While seemingly uneventful, this can be the desired outcome when attempting to corrupt a powerful item without risking its utility.

2. Modifier Reroll with Scaling – 25% Chance

This outcome randomizes the numeric values of explicit modifiers, similar to using a Divine Orb. However, there's more depth:

• Applies a modifier magnitude multiplier ranging from 0.78x to 1.22x, in 0.01 increments.
• The multiplier is applied before any quality-related effects.
• Final values are rounded to the nearest whole number, unlike typical truncation in the game.

Rounding Behavior Note:
Testing indicates a formula similar to trunc(value + 0.5) is used. This subtly biases results:

• Negative stats (e.g., -10% Dexterity) tend to round toward zero.
• Some values that you'd mathematically expect may never appear.
• Others (especially near-zero values) may appear more often.

This means a roll might seem “worse than expected” for players chasing perfect stats due to the rounding quirk.

3. Adds a Vaal Enchantment – 25% Chance

This rare and often valuable outcome applies a Vaal-specific enchantment to the Unique item. These enchantments:

• Cannot be removed or changed.
• Are only available via Vaal corruption.
• May grant completely new functionality or bonus effects.

Vaal enchantments are item-specific, meaning the effect depends entirely on the Unique item you're corrupting. Some of these can dramatically enhance the power of an item, while others may be purely thematic.

If you're preparing for high-stakes corruption attempts, don't forget to buy cheap Path of Exile 2 currency at U4N to stock up on Vaal Orbs and other essential materials before you dive in.

4. Adds an Item Socket (Weapons/Armor Only) – 25% Chance

This outcome:

• Adds a socket to weapons and armor, even if it exceeds the item's natural socket cap.
• Jewelry items (like rings, amulets, belts) receive no change.
• The added socket is permanent and not removed by Omen of Corruption.

This can result in unusual and powerful configurations:

• 7-socket weapons or 9-socket chests become possible.
• Players aiming for alternate link setups or trigger crafts may value this outcome highly.

Using a Vaal Orb on Unique items in Path of Exile 2 is a gamble, with outcomes evenly split among four possibilities. While each has a 25% chance, the modifier reroll outcome is the most complex due to its hidden multiplier and unique rounding logic. Whether you're hunting for powerful enchantments or trying to maximize sockets, understanding the math behind corruption helps you take calculated risks.