The Sculk Catalyst is an active block in Minecraft capable of using the essence of the dead to convert other blocks surrounding it into Sculk variants. More specifically, this «living block» will consume the Experience dropped from any mob that died within an 8-block radius, including the player. When an entity, such as a Sheep or Zombie, dies within this 8-block range, the Wild Update's Sculk Catalyst in Minecraft will transform the blocks near the splash of Experience orbs into Sculk-type blocks, including basic Sculk, Sculk Sensors, Sculk Shriekers, and Sculk Veins.
If a Sculk Catalyst attempts to convert a block that cannot be turned into Sculk, it will instead be covered with Sculk Veins. Whenever Sculk Blocks are generated from a catalyst, there's a 9% chance it will be a Sculk Shriekers and a 1% chance it will become a Sculk Sensor. However, the Sculk Shriekers that originated from a Sculk Catalyst are not able to summon a Warden, no matter the level of alarm. Furthermore, it should be noted that the Experience dropped from a dead mob does affect how far the Sculk spreads from a Sculk Catalyst in Minecraft.
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To get a Sculk Catalyst in Minecraft, players will need to find the Deep Dark, an underground biome characterized by being filled with Sculk and intensely dark. This biome typically generates near bedrock but can also be found at a variety of subterranean elevations. The most likely place players will find Deep Dark is an area far away from water. This is because a location with a low level of Erosion has a higher chance of generating the Deep Dark. Ancient Cities, the palatial structures found within the Deep Dark, also contain Sculk
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