Chamber Ruins are small underground dungeon-like structures.
Chamber Ruins are found underground in any biome a Trial Chambers can be found, between Y levels -20 and -40.
There are 4 different Chamber Ruins variants; all are a small room with a random Trial Spawner in the middle. Some have hazards like Lava or Cobwebs.
This Trial Spawner is a bit different from ones found in Trial Chambers. It can be one that spawn Slimes, Husks, Spiders, Zombies, Boggeds, Skeletons, Strays, Cave Spiders, or Silverfish.
Players can join the fight or activate the Trial Spawner from up to 7 blocks away.
Mobs can spawn up to 3 blocks away from the Trial Spawner. 5 mobs will spawn from it in total (+2 per extra player), but only 3 can exist at once (+2 per extra player). Every 2 seconds, it can spawn more mobs as required.
During an Ominous Trial here, a total of 10 mobs will spawn (+3 per extra player), and more mobs can exist at a time.
Trial Spawners in Chamber Ruins have a 25 minute cooldown before activating again.
Non-Ominous Trial Spawner (one of these is dropped):
1 Name Tag
1 Saddle
1 Ender Pearl
2-4 Bottles o' Enchanting
2-4 Raw Iron
2-4 Raw Gold
2-4 Amethyst Shards
Ominous Trial Spawner (one of these is dropped):
5-7 Bottles o' Enchanting
4-7 Raw Iron
3-5 Raw Gold
2-5 Amethyst Shards
1-2 Ender Pearls
1 Music Disc (Creator)
1 Music Disc (Creator (Music Box))
1 Music Disc (Precipice)
1 Music Disc (Relic)