Under Lock and Key
Brush an Armadillo with a Brush
Overview
Under Lock and Key is a task advancement in the Adventure tab of Minecraft's advancement system, carrying the in-game description "Brush an Armadillo with a Brush." It branches directly off Adventure, so that earlier advancement is its prerequisite and must be earned first. The Adventure tab covers advancements focused on exploration, combat, trading, and interacting with the world and its inhabitants. Under Lock and Key was added in Minecraft 1.20.5, from the Trails & Tales era, and remains part of the current 1.21 advancement set.
It is rated Easy difficulty on this site: can be completed quickly with minimal resources. Good for beginners. It uses the standard task frame, meaning it is a normal step in the tree rather than a goal or challenge milestone. Nothing else in the tree depends on it, so it is a leaf at the tip of its branch.
In tree terms, Under Lock and Key sits first along its line: the full path from the Adventure root reads Adventure -> Under Lock and Key. That means 1 advancement must be completed before this one becomes available, and Under Lock and Key is one of 40 total advancements in the Adventure tab. It shares its parent with 16 sibling advancements (Voluntary Exile, Monster Hunter, What a Deal!, Sticky Situation, Ol' Betsy, Surge Protector, Crafting a New Look, Adventuring Time, Sweet Dreams, Is It a Bird?, Caves & Cliffs, Who Needs Rockets?, Blowback, Minecraft: Trial(s) Edition, Postmortal, and Respecting the Remnants), all of which open from the same point in the tree.
How to Complete Under Lock and Key
Earning Under Lock and Key comes down to the following, performed in order:
- Find an Armadillo in a savanna or badlands biome and use a brush on it.
- Armadillos drop armadillo scutes when brushed, which can be used to craft Wolf Armor.
Tips & Fastest Route
Tips & Fastest Route- Fastest route: Craft a brush (feather, copper ingot, stick) and brush an armadillo.
- Armadillos roam savanna and badlands biomes and drop a scute when brushed.
- Scutes craft Wolf Armor, which ties into the Husbandry repair advancement.
- Make sure Adventure is already ticked off before you start, otherwise Under Lock and Key will not be tracked even if you perform the steps correctly.
- This is one of the more approachable Adventure advancements, so it is a good early target while you build toward the harder entries deeper in the branch.
Common Mistakes
Common Mistakes- Remember that Under Lock and Key will not appear as available until Adventure is done, since the game only tracks an advancement once its parent has been unlocked.
Reward & What It Unlocks
Reward & What It UnlocksCompleting Under Lock and Key grants 10 experience points. The XP drops at your position the moment the advancement fires.
It is a leaf advancement, so nothing further unlocks from it; it stands as a completed tip of its branch.
Details
Advancement ID
Category
Version AddedAdvancement Tree
Parent Advancement
Child Advancements
Under Lock and Key Advancement FAQ
How do you get the Under Lock and Key advancement in Minecraft?
Craft a brush (feather, copper ingot, stick) and brush an armadillo. In full, find an Armadillo in a savanna or badlands biome and use a brush on it. Armadillos drop armadillo scutes when brushed, which can be used to craft Wolf Armor.
What do you need for Under Lock and Key?
Before you can work on it you must have completed Adventure. Find an Armadillo in a savanna or badlands biome and use a brush on it. Armadillos drop armadillo scutes when brushed, which can be used to craft Wolf Armor.
Which advancement tab is Under Lock and Key in?
Under Lock and Key is in the Adventure tab, hanging beneath Adventure. Its in-game advancement ID is minecraft:adventure/brush_armadillo.
Is Under Lock and Key part of the Adventure branch?
Yes. Under Lock and Key sits directly below Adventure in the Adventure tree, so you must earn Adventure first. It is a leaf, so nothing further unlocks from it.
How much XP does Under Lock and Key give and how hard is it?
Under Lock and Key awards 10 XP and is rated Easy difficulty.
When was Under Lock and Key added to Minecraft?
Under Lock and Key was added in Minecraft Java Edition 1.20.5 and is present in the current 1.21 advancement set.