> For the complete documentation index, see [llms.txt](https://feliperoddd.gitbook.io/gasify/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://feliperoddd.gitbook.io/gasify/gameplay-effect-ge/modifier.md).
# Modifier
A modifier describes how to alter the value of an Attribute when its GameplayEffect is applied.
Modifiers can execute three distinct operations:
```csharp
Add, Multiply, Override.
```
All the addition modifiers are applied to the base value before any multiplication.
```csharp
resultValue = (baseValue + modification.add) * (modification.multiply + 1);
```
## Modifiers come in a few flavors:
### BasicModifier
The simplest modifier. A constant value that is not altered.
### ScalableModifier
A modifier that scaled its value based on a AnimationCurve. The X axis, or how much to scale, is defined by the level of the GameplayEffect applying it. So a curve with point {1,1} and {10,20} will gradually scale the modifier between 1 and 20 depending on the value of ge.level.
### ScalableModifierCSV
A modifier that uses a simple .csv file to scale its value. Useful if you want designer to set exactly what value it'll output at what ge.level.
### AttributeBasedModifier
A modifier that uses an attribute from the ASC as its value (e.g. value 2 with baseAttribute Health, would mean 200% of currenct ASC's health). It also has an optional ge.level scaling AnimationCurve.
## ***ATTENTION:***
To add the modifier via Editor, scroll down the GE scriptable object and click the "**ADD MODIFIER WITH TYPE"** button. *(Modifiers need to be instantiated with their type, otherwise they'll inherit the base class that does nothing (It always return 0))*
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