Commands & Data guides — page 2

Six version options, four world generators — three of them are the same world

26.1, 26.2 and 26.x all resolve to one generator, so a seed gives identical terrain in all three. But 1.21.0 and 1.21 do not, and that catches people mid-line.

Spawn eggs cover 88 of 158 entities — and exactly three real mobs have none

70 entity types have no spawn egg, but 65 of those are boats, projectiles and display entities. Only Giant, Illusioner and Mannequin are actual mobs you cannot egg.

The extension does not tell you the schematic format — 31 of 33 .schematic files were something else's guess

Five formats, four different ways of packing blocks, and .schematic is shared by two of them. Sniffing the NBT root beats trusting the filename, with counted evidence.

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

26.2 ships 28 trial spawner configs as 14 normal/ominous pairs. All 14 ominous ones carry a loot table and none of the normal ones do — but 9 of the 14 pairs spawn exactly the same mobs.

Villager trades by tier: Expert has the most, Master has the fewest

291 villager trades across 15 professions in 26.2. Level 4 carries 93 of them and level 5 only 27 — and there are 2.5× more ways to spend emeralds than to earn them.

The Wandering Trader: 97 offers, but it will only buy from you 12 times

91 of its 97 trades cost emeralds and just 6 earn them — and every one of those six is capped at 2 uses. It is the largest trade list in the game and almost entirely one-directional.

World generation changed twice since 1.20, at 1.21.2 and 1.21.4 — and not since

The four generator ranges, spelled out. Everything from 1.21.4 through 26.2 shares one generator, so a seed checked on any of them is correct on all of them.

/worldborder has ten forms, and only two of them animate

set and add take an optional time argument that shrinks the border gradually; the other eight are instant. Plus what Minecraft's four border defaults actually mean.

Why Minecraft says "Too Expensive!" — and the anvil order that avoids it

The prior-work penalty doubles every time you touch an anvil. Here is the rule behind it, and how to sequence combines so a full enchant set never hits the 40-level wall.

The /give command after data components: what replaced NBT tags

1.20.5 replaced item NBT with data components, and most /give snippets online are still written the old way. Here is the mapping from the tags you know to the components that work now.