You can use the advancements filter to hide or restrict items until a player has earned a specific advancement. This can be useful for keeping EMI clean during early-game progression: for example, hiding Nether-gated items until the player has actually visited the Nether.

The rule is active (items are hidden/blocked) while the player has not yet earned the advancement. Once the advancement is obtained, the rule automatically deactivates and the items become visible and usable.

Hide Nether Items Until Visiting the Nether

Hides all items from a Nether-content mod in EMI until the player has the minecraft:nether/root advancement (awarded when they first enter the Nether).

{
  "action": "remove",
  "mod": ["nethermod"],
  "advancements": ["minecraft:nether/root"]
}

Hide End Items Until the Player Reaches the End

{
  "action": "remove",
  "mod": ["endmod"],
  "advancements": ["minecraft:end/root"]
}

Gate a Single Item Behind an Advancement

Hides the Elytra from EMI and removes it from inventories until the player has killed the Ender Dragon.

{
  "action": "remove",
  "items": ["minecraft:elytra"],
  "advancements": ["minecraft:end/kill_dragon"]
}

Require Multiple Advancements

When multiple advancement IDs are listed, the rule deactivates only after the player has earned all of them. This example hides an end-tier item until the player has both entered the Nether and entered the End.

{
  "action": "remove",
  "items": ["examplemod:endgame_item"],
  "advancements": [
    "minecraft:nether/root",
    "minecraft:end/root"
  ]
}

Combine With Dimension Filters

You can stack advancements with dimensions and other filters for fine-grained control. This example removes a specific item from player inventories while they are in the Overworld AND before they have reached the Nether.

{
  "action": "remove_inventory",
  "items": ["examplemod:nether_key"],
  "dimensions": ["minecraft:overworld"],
  "advancements": ["minecraft:nether/root"]
}

Keep an Item Hidden from EMI After an Advancement

Use not to invert the logic: the rule applies only after the player has earned an advancement, hiding starter items that are no longer relevant.

{
  "action": "remove",
  "items": ["minecraft:wooden_sword"],
  "not": {
    "advancements": ["minecraft:story/obtain_armor"]
  }
}