Nightmare (The Shadow)

2.0.0 — The Corruption Update

MC 1.21.11 + NeoForge 21.11.42 · Java 21

New blocks

• Block of Pure Darkness — fully black, spreads slowly on the surface and tunnels through underground stone without breaking into caves; gives Darkness when stepped on; the Shadow trails and places it; reverts to dirt when the Nightmare ends.
• Shadow Water — fully black, walk-through; gives Darkness + Wither II; created when Pure Darkness touches water; evaporates when the Nightmare ends.

Shadow behaviour

• Watches far more, attacks far less (much higher patience thresholds, longer stares).
• Steals from nearby chests/barrels/furnaces.
• Can banish a hunted player to a deep cave (Darkness II + Blindness).
• Immune to Poison & Wither; swims 60% faster in Shadow Water; can't use boats/minecarts.

Balance & progression

• 1 Shadow per 2 online players.
• Each kill makes the next Shadow +100 HP; persists with the world.

Commands — enable/killcount any player; disable/resetkills op level 2.

Technical — full 1.21.11 port; nightmare flag moved from game rule to per-world save data; DeferredRegister.Blocks/.Items fixes the "id not set" crash; render-state pipeline; component-based spawn egg.