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Ominous trial spawners: the loot changes, the spawn counts mostly do not

26.3 ships 28 trial spawner configs as 14 normal/ominous pairs. Every ominous one names its own loot tables and every normal one falls back to the defaults — and 9 of the 14 pairs spawn exactly the same mobs.

2026-08-01

Trial Omen — what Bad Omen from an Ominous Bottle becomes when a trial spawner detects you — turns a trial chamber spawner ominous, and the usual summary is "harder fight, better loot". Half of that is right. Counted from Mojang's shipped trial_spawner configs for 26.3 — the same files the browser on this page reads — the loot half is categorical and the difficulty half mostly is not.

28 configs, 14 pairs

Every trial spawner ships twice: …/normal and …/ominous. 14 of each, across 10 mobs — breeze, husk, spider, zombie, bogged, skeleton, stray, cave spider, silverfish and slime.

The loot difference is absolute

All 14 ominous configs name their own loot tables. All 14 normal ones name none.

Naming none does not mean dropping nothing. A config that leaves out loot_tables_to_eject falls back to the game's defaults, spawners/trial_chamber/key and …/consumables — which is where the ordinary Trial Key comes from. Every ominous config swaps in spawners/ominous/trial_chamber/key and …/consumables instead, weighted 3 to 7: the Ominous Trial Key and the ominous potion-and-food drops.

So the reward side of "ominous is better" is a swap of tables, not a tuning difference.

The difficulty difference is much smaller than people think

Compare each pair's mobs-at-once and total-mobs values and 9 of the 14 pairs are identical. Going ominous changes nothing about how many mobs those nine spawners produce.

Only five pairs differ at all:

A value a config leaves out takes the game's default — 2 at once, 6 in total — so the normal spider family spawns six, not zero, even though its file names no total.

The four small-melee ones move together — same numbers, same shape — which is what you would expect from configs written as a family rather than tuned individually.

That leaves every zombie, husk, skeleton, stray and bogged spawner producing the same mob counts ominous or not. If an ominous chamber feels harder on those, it is the mobs' ominous equipment and the items an ominous spawner drops on you doing it, not the spawner emitting more of them.

One rate is different, and only for three spawners

ticks between spawns is 20 — one second — for 22 of the 28 configs. The exception is the slow-ranged skeleton family:

trial_chamber/slow_ranged/skeleton, …/stray and …/poison_skeleton

Those six rows (three spawners × normal and ominous) use 160 ticks, eight seconds. Ranged attackers get an eight-times-longer gap between spawns than everything else in the chamber, in both variants.

Why this matters if you are building one

/setblock a trial spawner with a custom config and the numbers above are the baseline you are deviating from. Two things are worth copying rather than inventing:

• Leaving loot_tables_to_eject out does not mean no loot — it means the default key and consumables tables, which is what every vanilla normal spawner pays out. Name a table only when you want something other than that.
• Give ranged spawners a much longer interval than melee ones. Vanilla's 8× gap is the difference between a fight and a wall of arrows.

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