Effect

The arc:effect condition type checks for a specific mob effect.

Parameters

Parameter	Type	Required	Default	Description
effect	MobEffectInstance	✅Required	-	The effect to check.
check_amplifier	boolean	❌Optional	false	Whether to check the amplifier.
amplifier_comparison	ComparisonType	❌Optional	==	How to compare the amplifier.
check_duration	boolean	❌Optional	false	Whether to check the duration.
duration_comparison	ComparisonType	❌Optional	==	How to compare the duration.

Example

The following example will give the player a feather every time they receive the Slow Falling effect.

data/my_datapack/arc/feather_for_slow_falling.json

{
    "holder": {
        "type": "arc:player",
        "id": "arc:player"
    },
    "type": "arc:on_add_effect",
    "conditions": [
        {
            "type": "arc:effect",
            "effect": "minecraft:slow_falling"
        }
    ],
    "rewards": [
        {
            "type": "arc:item",
            "item": { "id": "minecraft:feather" }
        }
    ]
}

Compatible Action Types

💉 On Effect Added

The arc:onaddeffect action type is triggered when a player receives a potion effect.