A placed spawner produces mobs for you to kill. On Survival it works in physical mode: it spawns real mobs next to the block, and the mobs' drops and experience fall in the world where you kill them.
Production cycle#
- Every 30 seconds (checked every 15 seconds) an active spawner adds mobs to its stack.
- The number added is the stack size times the Spawn Amount multiplier, up to 32 mobs per cycle. A stack of 64 therefore adds 32 mobs per cycle without upgrades.
- The mobs appear within 4 blocks of the spawner, inside the spawner's chunk, and join the spawner's existing mob stack if there is one, so you see a single stacked mob such as Zombie x32.
- Cycles use the 30-second interval divided by the Spawn Speed multiplier: see Spawner Upgrades.
When a spawner works#
| Condition | Rule |
|---|---|
| Activation | A player must be within 32 blocks. The owner does not have to be online |
| Room | The spawner stops adding mobs when it reaches its cap: 128 mobs per spawner, 384 spawner mobs per chunk or 128 of the same mob within 4 blocks, whichever comes first |
| Space | The mobs need open space near the spawner; if the spawner is walled in it still grows an existing mob stack |
| Paused | A spawner you paused with /spawner pause does nothing until you /spawner resume |
| Chunk loaders | A battery-powered chunk loader in the spawner's chunk keeps it working with nobody nearby |
A powered Mob Summoner machine within 16 blocks of a spawner doubles its production speed (the 30-second cycle becomes 15 seconds). Several summoners in range do not stack.
Drops and experience#
- Killing a stacked mob removes one mob from the stack. Its drops and experience drop at the mob, exactly like a normal mob.
- The Drop Chance upgrade adds extra copies of each drop: see Spawner Upgrades.
- Experience can be increased by spawner XP boosters.
- Mobs spawned by a spawner pay reduced mob points (40% of the wild rate) and count for Slayer XP: see Mob Points and Slayer Skill. They do not count for kill milestones, which only count wild mobs.
The spawner panel#
Right-click a placed spawner to open its Survival Spawner panel. Anyone can open it; only the owner can change things.
| Slot | What it does |
|---|---|
| Shows the mob, stack size, mode, virtual support, storage, stored experience and whether the spawner is paused | |
| Collects stored items and XP (always empty on Survival) | |
| Opens the shop buy screen for another spawner of this type | |
| Opens the Spawner Upgrades menu | |
| Withdraw buttons | Take 1, half, a custom amount or all spawners out: see Spawner Stacking |
| Closes the panel |
The production-mode button is hidden on Survival because virtual mode is not available.
Hologram#
A floating label above each spawner shows <Mob> Spawner, its Stack size, its Mode, its Status (Active, Paused with the reason, or Storage full) and the number of stored items and XP.
Commands#
See the command table on Spawners: /spawner info, /spawner panel, /spawner pause and /spawner resume. Virtual production is not available on Survival, so switching a spawner to virtual mode is refused.