AdvancedSurvival
How to get the mace in Minecraft (heavy core and breeze rod)
30% of the time an Ominous Trial Key, otherwise consumables.
Tested 26.3

The Ominous Trial Key is the reward of an ominous trial spawner, used to open ominous vaults.
Drink an Ominous Bottle near the chambers to get Trial Omen, beat the ominous waves, and the spawner gives this key. Each ominous vault opens once per player and holds the best loot of the chambers.
This item has no crafting recipe.
30% of the time an Ominous Trial Key, otherwise consumables.
its Trial Spawners turn ominous and can drop Ominous Trial Keys.
It can be found as loot in Trial Chambers.
It opens ominous vaults. Used with: Vault.
Revaulting (Unlock an Ominous Vault with an Ominous Trial Key).