NeoForge Biome Modifiers

I'm trying to make it so Phantoms spawn in the end dimension, and I saw an example from the mod Forbidden and Arcanus which makes use of this by (forbidden_arcanus/neoforge/biome_modifier /add_lost_soul_overworld.json) { "type": "neoforge:add_spawns", "biomes": "#minecraft:is_overworld", "spawners": { "type": "forbidden_arcanus:lost_soul", "maxCount": 3, "minCount": 1, "weight": 35 } } Researching on Neoforge's docs, and it mentioned the datapack would need to go here: data//neoforge/biome_modifier/.json My question is how do load this for vanilla mobs, since there isn't a mod id, and what would I name the file? And also would this be correct datapack format to spawn them in the end? { "type": "neoforge:add_spawns", "biomes": "#c:is_end", "spawners": { "type": "minecraft:phantom", "maxCount": 3, "minCount": 1, "weight": 100 } } If it matters on I'm 1.21.1 NeoForge, and I was going to use KubeJS to load this datapack