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Dragon Block Plugin

A Paper / Folia plugin (1.21.x) that prevents the Ender Dragon from destroying blocks — unless they're explicitly whitelisted by the server administrator.

Purpose

When players fight the Ender Dragon, the dragon destroys large swaths of terrain as it flies through blocks. On survival / anarchy / kit servers this can:

Gut end-island farms (chorus, endermen)
Destroy bridges, pathways, and builds near the portal
Leave the End dimension permanently scarred

This plugin intercepts both pathways the dragon destroys blocks:

Pathway	Event handled	Behaviour
Dragon flying through blocks	`EntityChangeBlockEvent`	Cancelled unless block is whitelisted
Dragon / fireball explosions	`EntityExplodeEvent`	Non-whitelisted blocks removed from explosion

Config

File: plugins/dragon-block-plugin/config.yml

# Block names are Material enum values (case-insensitive).
# Empty list = dragon cannot destroy ANY blocks.
whitelisted-blocks: []

Example — allow only obsidian and end stone

whitelisted-blocks:
  - OBSIDIAN
  - END_STONE

Full list of block Material names:
https://jd.papermc.io/paper/1.21/org/bukkit/Material.html

Commands

Command	Permission	Description
`/dragonblock reload`	`dragonblock.admin` (OP by default)	Reloads config.yml without a server restart
`/dragonblock`	`dragonblock.admin`	Shows usage

Permissions

Node	Default	Description
`dragonblock.admin`	`op`	Access to `/dragonblock` commands

Installation

Drop the JAR into your server's plugins/ folder
Restart the server (or use a plugin manager like PlugManX)
Edit plugins/dragon-block-plugin/config.yml to whitelist blocks
Run /dragonblock reload to apply changes

Compatibility

Platform	Status
Paper 1.21.x	✅ Fully supported
Folia 1.21.x	✅ Fully supported (`folia-supported: true`)
Spigot 1.21.x	⚠️ Untested — the Brigadier command API requires Paper

The plugin uses Paper's Brigadier command API and the Adventure component API. It does not use BukkitScheduler — events fire on the correct region thread in both Paper and Folia.

Build

Requirements: JDK 21+

./gradlew build
# JAR → build/libs/dragon-block-plugin-1.0-SNAPSHOT.jar

Run a test server (requires Paper 1.21.x in Gradle cache):

./gradlew runServer

License

MIT — do whatever you want.

dragon-block-plugin