24w18a.
Some Vaults appear to be Ominous in Spawned-in and Naturally Generated Trail Chambers.
No Effects On Spawn/Generation
in Both Superflat and Regular Worlds
Both Attachments were on the Same Chamber
Attachments
Comments 3
To confirm what @unknown said, here is an excerpt from the 24w13a changelog for further reference:
OMINOUS VAULT
These can be found throughout the Trial Chambers in harder to find places and require an Ominous Trial Key to unlock
Ominous Vaults are always available in the end corridor and the intersections. This means there are always at least 2 per Trial Chambers. Additional Ominous Vaults are found in the corridors. There can be 0-8 available, depending on the the luck of the generation.
@unknown in this comment
The one in the red glazed terracotta is meant to be Ominous variants. The one with the cut copper around it is meant to be normal Vaults. This is Working as Intended.