Revelations via Data Pack

Have to be placed in the folder resources/data/<<mod_id>>/revelations

{
  "advancement": "spectrum:milestones/reveal_quitoxic_reeds",
  "block_states": {
    "minecraft:grass": "minecraft:beacon",
    "minecraft:tall_grass": "minecraft:obsidian",
    "minecraft:tall_grass[half=upper]": "minecraft:netherite_block"
  },
  "items": {
    "minecraft:nether_star": "minecraft:gunpowder"
  }
}