Custom Mechanics¶
uSkyBlock adds a few gameplay mechanics on top of vanilla Minecraft. These are server-configurable, so not every feature listed here may be active on your server.
Guardian habitats¶
Skyblock worlds don't have ocean monuments, but you can still obtain guardians by building your own habitat.
Place prismarine, prismarine bricks, or dark prismarine blocks in a deep ocean biome on your island. When water mobs would normally spawn beneath these blocks, there is a chance a guardian spawns instead.
Note
This is a building mechanic, not natural spawning. Guardians will not appear in deep ocean biomes without prismarine blocks above the spawn location.
Requirements:
- The biome must be one of: deep ocean, deep cold ocean, deep frozen ocean, or deep lukewarm ocean. Use
/island biometo set your island's biome. - A prismarine block must be directly above the spawn point (acts as the "roof" of your habitat).
- Your island's monster spawn limit must not be full. Check with
/island limits.
The spawn chance and per-island guardian cap are set by the server.
Nether terraforming¶
In the skyblock nether, breaking blocks with a pickaxe can generate new blocks nearby. This is the primary way to expand and gather nether resources on a sky island.
When you break a block, there is a chance a new block spawns in a nearby valid location. What spawns depends on what you broke:
| Block broken | Can generate |
|---|---|
| Netherrack | Netherrack, nether quartz ore, soul sand |
| Nether quartz ore | Nether quartz ore |
| Soul sand | Soul sand, gravel |
| Gravel | Gravel, soul sand |
| Glowstone | Glowstone |
Tool tiers matter¶
Your pickaxe material affects the probability of block generation:
| Pickaxe | Effectiveness |
|---|---|
| Wood | No terraforming |
| Stone | Normal |
| Iron | Slightly reduced |
| Gold | Best (1.5x) |
| Diamond | Heavily reduced |
| Netherite | Good (1.2x) |
Tip
Gold pickaxes are the most effective for terraforming despite their low durability. Consider bringing several.
Nether mob replacement¶
When a zombified piglin spawns on nether bricks (fortress walkways), it has a chance to be replaced by a more dangerous mob:
| Mob | Chance |
|---|---|
| Wither skeleton | 20% |
| Blaze | 20% |
| Skeleton | 10% |
| Zombified piglin | 50% (no change) |
This gives you a way to farm wither skulls and blaze rods without needing a full nether fortress.
Spawn limits¶
Islands have per-type mob caps for animals, monsters, villagers, and golems. These prevent lag from excessive mob farms and apply to all spawn sources.
Run /island limits to see your island's current limits and usage.