> For the complete documentation index, see [llms.txt](https://docs.sefiraat.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sefiraat.dev/netheopoiesis/purification/mob-swapping.md).

# Mob Swapping

As you purify the Nether, you'll slowly attract new forms of fauna into the world. When a normal Nether mob tried to spawn in a location with a high enough purification level, the spawn will fail and be replaced with one from the Overworld.

These spawns respect the Nether's day/light cycle, meaning you will will get Overworld hostile mobs during the night and passive mobs during the day.

## Required Purification Level

| Mob              | Purification Level |
| ---------------- | ------------------ |
| Magma Cube       | 500                |
| Blaze            | 1,000              |
| Zombified Piglin | 1,000              |
| Hoglin           | 1,500              |
| Piglin Brute     | 2,000              |
| Ghast            | 2,000              |
| Wither Skeleton  | 2,000              |


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