It works on 1.21.5+
HeadHunter Plugin
HeadHunter is a lightweight yet powerful plugin that brings life (and death!) to Minecraft mobs and players by enhancing head drops, sounds, and visual effects. Perfect for survival worlds, RPG servers, and minigames, this plugin gives players exciting rewards and adds immersive audio, visual feedback to head related events.

Free to use without any plugin advertising - Since I hate those plugins ngl

Features

• Player Head Drops — Players drop their own custom head on death (optional).
  
  
• Mob Head Drops — Over 70+ mobs with configurable drop chances (optional).
  
  
• Mob Sounds & Effects — Place heads on noteblocks to trigger realistic mob sounds, particles, and optional messages.
  
  
• Texture Initialization (initializeMobTextures) — Automatically initializes custom textures for mob heads with minimal setup.
  
  
• Fully configurable via a simple config.yml. View Documentation for the config