View source for Monster Spawner

{{Infobox|
|bodyclass       = mw-collapsible floatright
|image1          = [[File:MonsterSpawner.webp|400px|link=]]
|imagerowclass1  = infobox-image

|header1         = Monster Spawner
|rowclass1       = infobox-title

|label2          = Blast Resistance
|data2           = 25
|rowclass2       = data-loc infobox-data infobox-col2

|label3          = Fireproof
|data3           = Yes
|rowclass3       = data-behavior infobox-data infobox-col2

|label4          = Drop Rate
|data4           =
* 33% by [[Cannoning#TNT|normal explosion]]
* 65% by [[Cannoning#TNT|lucky explosion]]
* 100% by pickaxe (Silk Touch)
|rowclass4       = data-occupation infobox-data infobox-col1

|label6          = 
|data6           = <span/>
|rowclass6       = data-padding infobox-data infobox-col1
}}'''Monster Spawner''' or simply a '''Spawner''' is a block that spawns mobs (or monsters). Mobs from spawners are a means to grind player XP by killing. They are also the primary method to grind money overnight by setting up automated death traps. Spawner mobs come in varying XP drops, drop rates, sell prices, and health.

Monster Spawners are the primary source of value in a [[Factions_Overview#Faction_Top|value-based /f top map]].
== Behavior ==
A spawner is active when there is at least 1 player viewing the chunk (i.e., activation is based on render distance). This equates to 5 chunks (80 blocks horizontally, ∞ blocks vertically). Mobs from spawners stack within the chunk based on type. This means there can only be 1 stack of Cow, 1 stack of Zombie, 1 stack of Blaze, etc. in a chunk. A spawner will spawn a mob only within the same chunk that it is placed in, and always 0–3 blocks above the spawner. More spawners lead to higher rate of replenishment (i.e., larger stack sizes).

Right-clicking a spawner block while holding a spawner in hand (of the same type) increases the stack size of the placed spawner by +1. Multiple spawners can be stacked within the same block, up to 40x spawners within the same block. Stacked spawners function the same way as individual spawners, meaning a stack of 5x spawners is no different than having 5 separate spawners placed within the same chunk.

Once placed, a spawner block can be mined using a Silk Touch enchanted pickaxe. A spawner is free to mine for the next 5 minutes. After this grace period, there is a fine of 10% the spawner [[#Properties|valuation]]. If the spawner is stacked, this fine is appropriately multiplied.

== Stacking ==
[[File:MonsterSpawnerMobStack.webp|thumb|A stack of 28,935x Enderman depletes while another Enderman takes its place.]]
Mob stacking is a behavior that reduces frames-per-second (FPS) and server performance by limiting the number of mobs in a chunk in a way that does not hinder the functional output from having otherwise individual mobs. When a spawner mob is killed, its stack size depletes by 1 and another mob (of the same type) is spawned at its location. If the damage dealt exceeds the maximum health of the mob, the remainder of the damage is passed to the next mob stack. This makes it possible to deplete >1 stack in one hit. A mob from spawner will stack up to 32,767x (i.e., <math>2^{15}-1</math>), after which its stack size will cease to increase.

Stack size also determines persistence. A mob with a stack size ≥64 will not despawn on chunk reloads and server restarts. A mob with a stack size of 1 will cease to take fire damage (or water damage in case of nether mobs). In a claimed territory, a member of the faction may run <code>/smite</code> to forcefully despawn a stack of mobs. This will not result in any loot drops or XP gains.

== Properties ==
Spawner mobs are largely immobile, meaning they will not respond to water currents and knockbacks. However, they may be transported from one location to another using a fishing rod. Spawner mobs will drop player XP only when inflicted by melee damage, but will always drop loot regardless of the source of inflicted damage.

Most spawners can be bought directly from <code>/shop</code>, but few spawners are obtainable only through a mystery monster spawner. A mystery spawner costs $3,000,000 in <code>/shop</code> and gives a random spawner. However, high-demand spawners are locked behind loot pools.
{{Template:CosmicPE_monster_spawner_props}}

== Timeline ==
{{Changelog:Timeline_Monster_Spawner}}