How do you get Uh Oh in Minecraft?

Find a large sulfur cube in sulfur caves, the 26.2 cave biome (small ones can't absorb blocks).

What kind of advancement is Uh Oh?

Uh Oh is a Husbandry tab advancement in Java Edition.

Uh Oh

Tab: HusbandryDifficulty: Easy

Quick answer: Have a Sulfur Cube absorb a TNT block

Previous advancement: Husbandry

How to get Uh Oh

Find a large sulfur cube in sulfur caves, the 26.2 cave biome (small ones can't absorb blocks).
Craft or bring a TNT block (5 gunpowder + 4 sand).
Feed the TNT to the cube: use it on the mob directly, or drop the block on the ground nearby and it will hop over and gulp it.
The cube absorbs the block and stops moving. That gulp completes the advancement.

Tips

TNT gives the cube the explosive archetype: flint and steel, fire, explosions or a redstone signal prime it with a 6-second fuse (under a second if chained from another blast), and an exploding cube spawns no small cubes. Shear the cube first if you want your TNT back.

More guides from this tab (Husbandry): Stay Hydrated!Bee Our Guest The Parrots and the Bats You've Got a Friend in Me Whatever Floats Your Goat!Best Friends Forever