Plugin offers

Give players potion effects based on their permissions
Per world customization
Global permission: permissionEffects.*
Effects will not be removed when player: Respawns, drink milk or change world

Config file

You can add/edit or remove effects on config.json

{
    "messages": {
        "playerEffectsGiven": "§aYou have obtained your effects!"
    },
    "effects": [
        {
            "effectName": "speed",
            "amplifier": 1,
            "visibleBubbles": true,
            "ambient": false,
            "overrideColor": [147, 36, 35],
            "allowedWorlds": [
                "world"
            ]
        }

    ]
}