Nightmare (The Shadow)

2.1.3 — NeoForge 1.21.1 Port

Minecraft 1.21.1 + NeoForge 21.1.234 · Requires Java 21

Brings the mod to MC 1.21.1 on NeoForge — the current mainstream modding baseline. No gameplay changes from 2.1.x; this is a loader/version conversion from the 2.1.2 Forge 1.20.1 build.

Loader & toolchain

• Loader → NeoForge 21.1.234 on ModDevGradle (the modern NeoForge build plugin), Java 21.
• neoforge.mods.toml replaces the Forge mods.toml.

Loader APIs (net.minecraftforge.* → net.neoforged.*)

• Registration uses NeoForge DeferredRegister + DeferredHolder; spawn egg uses DeferredSpawnEggItem; config uses ModConfigSpec.
• Mod entrypoint takes (IEventBus, ModContainer); commands register on NeoForge.EVENT_BUS.
• Events remapped to NeoForge: LevelTickEvent.Post, FinalizeSpawnEvent, EntityJoinLevelEvent, LivingDeathEvent, BlockEvent.EntityPlaceEvent, PlayerEvent.*, @EventBusSubscriber.

Vanilla API updated 1.20.1 → 1.21.1

• ResourceLocation now built with ResourceLocation.fromNamespaceAndPath(...) (the public constructor is gone in 1.21).
• Attribute modifiers use a ResourceLocation id with Operation.ADD_MULTIPLIED_BASE (the 1.21 change from UUIDs).
• Mob effects and enchantments are Holder-based: effect checks use .is(...), and Smite is resolved via the enchantment registry lookup.
• defineSynchedData(SynchedEntityData.Builder) replaces the no-arg override.
• Persistent data uses the 1.21.1 SavedData.Factory + save/load(CompoundTag, HolderLookup.Provider).
• finalizeSpawn(...) drops its trailing CompoundTag (4-arg form).
• Data pack folders moved back to the singular 1.21 names (loot_table/, advancement/); pack_format bumped to 34.

Output

• nightmare-2.1.3-neoforge-1.21.1.jar