Laborratory

Laborratory is the seventh challenge stage in Vampire Survivors. This stage can be unlocked by collecting a total of 33 Rosaries.
Alternatively, Laborratory can be unlocked in the Forbidden Scrolls of Morbane by casting the Spell "divineassault".
==Description==
Formerly the foundry where the famed anti-vampiric weaponologist Santa Ladonna created many trinkets, the Laborratory now lies abandoned. Whispers echo that Santa fled from this makeshift workshop when her experimental alchemy somehow opened a door that was never supposed to be breached.
==Effects==
This stage features interactable rooms, winding corridors, and a train track found by going south. Each area has its own effects, which could either be in the player's benefit or detriment. Levers, a stage prop can be found throughout the stage, which, depending on Luck may spawn weapons, passive items, or swarms of tough enemies that rush by the player. Silver chests can be dropped before 10:00.
===Levers===
On this stage, levers appear at different locations on the map. Walking over these levers causes them to flip over, resulting in various effects, which include spawning a pickup, weapon, passive item, or enemy wave.
Some lever effects are unique to the location where they were found. Below are the possible locations where a lever can spawn.
#Central Room: The largest room and the nearest to the player's initial location. Located by going north of the central area. The levers found here may produce the following:
#*Santa Javelin / Arma Dio
#*Metaglio Left / Metaglio Right
#*Swarm of Yellow Reaper Trainees / Trinacria / Fallen Cherubbello (self-destructing)
# Danger Room: This room is located west of the central area and is characterized by the danger signs on the wall in front of the room. The levers found here may produce the following:
#*Cross / King Bible
#*Spellbinder / Clover
#*Swarm of Jellyfish / Dust Elementals / Musc Muscs
#Electricity Room: This room is located east of the central area and is characterized by the high voltage warning signs displayed on the front of the room, which can also be found on the walls of the corridor leading to this room. The levers found here may produce the following:
#*Santa Water
#*Silver Ring / Gold Ring
#*Swarm of Jellyfish / Dust Elementals / Musc Muscs
#Near the Railroad: The railroad located south of the stage—specifically, the walkway below the rails, and the platform by the corridors—frequently spawns levers that differ from levers found elsewhere in that they summon a train called Take Us Away rather than items or enemies. This train damages any enemy that it collides with on its path.
Additionally, levers may spawn pickups that are not room-specific and can spawn in any room type (not including the levers near the railroad).
Levers can spawn at the aforementioned locations off-screen, once every 20 in-game seconds. Each room may only hold up to 5 levers at once, but the area by the railroad can have levers up to the max destructible count of the stage (which is 12). The favorability of an effect and the spawn rate of the levers are affected by Luck.
The effect of Mad Groove (VIII) does not work on levers.
==Items==
The following items can be found in this stage:
===Pickups===
Levers found inside rooms can spawn a Coin Bag, Vacuum, Rosary, or Little Clover.
===Stage Items===
These items can be found by flicking the levers found inside rooms. Refer to the previous section for their locations.
====Weapons====
*Cross
*King Bible
*Santa Water
*Santa Javelin
*Arma Dio
====Passive items====
*Clover
*Attractorb
*Spellbinder
The 4 hidden stage items can also be found here, and this is the only place they can be found without the Yellow Sign.
*Silver Ring
*Metaglio Right
*Gold Ring
*Metaglio Left
==Waves==
:NOTE: As official sources name only a few of the enemies, unit names are mostly made up based on their internal IDs and are subject to change.
Laborratory waves	Laborratory waves 	Laborratory waves	Laborratory waves 	Laborratory waves 	Laborratory waves	Laborratory waves
Time Elapsed 	Enemies 	Enemy minimum 	Spawn interval (seconds)	Bosses & Treasure 	Map events 	Notes
0:00 	Fishman 	20 	1.0 	- 	- 	-
1:00 	Fishman 	30 	1.0 	Merman Boss 	 	A Swarm event spawns a cluster of enemies to attack the player.
2:00 	FishmanLizard Pawn 	40 	0.5 	- 	 	-
3:00 	Lizard PawnDust ElementalFishman 	40 	0.25 	Tri-Blunder Boss 	 	A Jellyfish Wall map event spawns a group of jellyfish in an ellipsoid ring around the player. The ring in turns closes in and gets farther from the player.
4:00 	Lizard PawnFishman 	25 	0.25 	- 	 	A Pile Assault map event spawns a group of enemies that shoot bullets in an ellipsoid ring around the player.
5:00 	Lizard RookDust Elemental 	10 	1.0 	Tri-Blunder Boss
ER-2000 Gunner	 	-
6:00 	Lizard RookFishman 	30 	0.5 	- 	 	-
7:00 	FishmanLizard Pawn 	30 	1.0 	Merman Boss 	 	-
8:00 	Bounty HunterT-DCCCDust Elemental	50 	1.5 	- 	 	-
9:00 	ConstableBotDust Elemental 	30 	0.5 	Merman Boss 	 	-
10:00 	ConstableBotDust Elemental 	20 	0.5 	ER-2000 Gunner 	 	-
11:00 	Bounty HunterT-DCCC 	100 	0.5 	Minotaur Champion 	 	-
12:00 	Bounty HunterFishman 	20 	1.0 	Giant Goat-Horned Shooter	 	-
13:00 	FishmanLizard RookLizard Pawn 	200 	0.1 	- 	- 	-
14:00 	FishmanRetroBot 	150 	0.5 	- 	- 	-
15:00 	Space HunterRetroBot 	50 	0.5 	- 	- 	-
16:00 	RetroBot 	80 	0.5 	ER-2000 	- 	-
17:00 	Space HunterTri-Blunder 	40 	0.1 	- 	- 	-
18:00 	Space HunterTri-Blunder 	90 	0.5 	Tri-Blunder Boss 	 	-
19:00 	Solid Tri-Blunder 	30 	0.5 	- 	 	-
20:00 	- 	1 	10 	The Reaper 	- 	All enemies on the screen are cleared. For every minute past 20, another Reaper spawns.
==Traps==
Stepping on "trap pizzas," which are circular plates on the ground, triggers an unavoidable map event, chosen from 9 predetermined options. These trap circles can be found inside the rooms, in front of where levers spawn, or on the corridors leading to other rooms. The traps have a minimum cooldown of 15 seconds before they can be triggered again.
Trap events in Laborratory	Trap events in Laborratory	Trap events in Laborratory	Trap events in Laborratory	Trap events in Laborratory	Trap events in Laborratory	Trap events in Laborratory
Event 	Unit 	Unit 	Amount 	Duration (seconds) 	Range 	Notes
Pile Assault 	 	T-DCCC (ranged) 	20 	5.0 	0.7 	-
Pile Assault 	 	ConstableBot (ranged) 	20 	5.0 	0.7 	-
Pile Assault 	 	Bounty Hunter (ranged) 	20 	5.0 	0.7 	-
Jellyfish Wall 	 	Wall Jellyfish 	80 	30 	- 	-
Jellyfish Wall 	 	Wall Jellyfish 	40 	30 	- 	-
Swarm 	 	RetroBot 	40 	15 	- 	-
Swarm 	 	RetroBot 	20 	15 	- 	-
Musc Musc Swarm 	 	Musc Musc 	200 	20 	- 	-
Jellyfish Swarm 	 	Swarm Jellyfish 	50 	20 	- 	-