Making enchantment effect stronger

[glacial helm]

Im trying to make an enchantment for swords and axes that give the wither effect, but im not sure how to scale the effects with the enchantments level, this is the code

{
"description": "Withering",
"exclusive_set": "minecraft:fire_aspect",
"supported_items": [
"minecraft:wooden_sword",
"minecraft:stone_sword",
"minecraft:golden_sword",
"minecraft:iron_sword",
"minecraft:diamond_sword",
"minecraft:netherite_sword",
"minecraft:wooden_axe",
"minecraft:stone_axe",
"minecraft:golden_axe",
"minecraft:iron_axe",
"minecraft:diamond_axe",
"minecraft:netherite_axe"
],
"weight": 15,
"max_level": 3,
"min_cost": {
"base": 10,
"per_level_above_first": 10
},
"max_cost": {
"base": 25,
"per_level_above_first": 10
},
"anvil_cost": 7,
"slots": [
"mainhand"
],
"effects": {
"minecraft:post_attack": [
{
"effect": {
"type": "minecraft:run_function",
"function": "wither"
},
"enchanted": "attacker",
"affected": "victim"
}
]
}
}

the function wither applies the wither effect to the entity:
effect give @s wither 10

[strong raptor]

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[dusk copper]

Don't run a function, you can just add an apply mob effect component to the post attack effect

And that'll let you set the duration and amplifier based on enchantment level

[glacial helm]

{
"description": "Withering",
"exclusive_set": "minecraft:fire_aspect",
"supported_items": "#minecraft:enchantable/sharp_weapon",
"primary_items": "#minecraft:swords",
"weight": 15,
"max_level": 3,
"min_cost": {
"base": 15,
"per_level_above_first": 10
},
"max_cost": {
"base": 25,
"per_level_above_first": 10
},
"anvil_cost": 7,
"slots": [
"mainhand"
],
"effects": {
"minecraft:post_attack": [
{
"effect": {
"type": "minecraft:apply_mob_effect",
"to_apply": "minecraft:wither",
"min_duration": 10,
"max_duration": 15,
"min_amplifier": 0,
"max_amplifier": 2
},
"enchanted": "attacker",
"affected": "victim"
}
]
}
}

like this?

YAY IT WORKS

THANKS