How do you get It Spreads in Minecraft?

Find a sculk catalyst in a deep dark biome or ancient city.

What kind of advancement is It Spreads?

It Spreads is a Adventure tab advancement in Java Edition, of challenge type.

It Spreads

Tab: AdventureChallengeDifficulty: Medium

Quick answer: Kill a mob near a Sculk Catalyst

Tree path: Adventure › Monster Hunter › It Spreads (advancements are independent: they can be completed in any order; the tree only guides progression)

Tree parent: Monster Hunter

Advancements are exclusive to Java Edition. The Bedrock Edition equivalent is achievements, which have different objectives.

How to get It Spreads

Find a sculk catalyst in a deep dark biome or ancient city.
Lure any mob that drops experience within about 8 blocks of the catalyst.
Kill it there: zombies, skeletons and animals all work. Only the ender dragon and mobs with no XP drops are excluded.
The catalyst consumes the XP and spreads sculk. That conversion completes the advancement.

Tips

Every kill near a catalyst grows the sculk patch, spawning more sensors and shriekers, so clear what you summon. An easy setup: drag a zombie from a spawner to the city edge and finish it by the catalyst.

More guides from this tab (Adventure): Adventure Heart Transplanter Voluntary Exile Country Lode, Take Me Home Is It a Bird?Monster Hunter