Start Effect

🌟 StartEffectMod

🧪 A lightweight utility mod that automatically grants potion effects to players when they join the world for the first time.

💡 About

This mod was originally created for our upcoming Calamity Protocol hardcore modpack —
where you get infected right after joining the world and must find a cure within 50 days (50 hours)!
But feel free to use it in your own projects or modpacks.

It simply applies configurable potion effects when a player joins the world,
and can optionally reapply them if removed.
Perfect for mapmakers, servers, or modpack creators who want custom start effects.

⚙️ Features

• 🎯 Apply any potion effect by ID (e.g. minecraft:night_vision)

• ⏱️ Custom duration & amplifier values

• 🔁 Optional “reapply if removed” mode

• 🧍 “Only once” mode for first join

• 💀 Optional “keep effect after respawn” and “reset duration on respawn” settings

• ⚡ Lightweight, server-friendly, and fully configurable

🧰 Configuration

A config file will be generated at:

You can modify:

• effect → potion effect ID

• duration → effect duration in ticks (20 ticks = 1 second)

• amplifier → effect strength

• onlyOnce → apply only on first login

• refillIfRemoved → reapply automatically if lost

• keepEffectOnRespawn → keep effect after respawn

• resetDurationOnRespawn → reset to full duration when respawning

🧾 License

📜 Licensed under MIT — free to include in any modpack or project.

🌌 Made For

🧱 Originally developed for the upcoming
Calamity Protocol modpack — now available for everyone!