Renri's Bestiary

By
Renri_XD

A living encyclopedia that fills itself in as you play — auto-records mobs, items and biomes, with full modded content support.

# Renri's Bestiary

**A living encyclopedia that fills itself in as you play.**

Renri's Bestiary adds a player-personal bestiary book that automatically records the mobs you slay, the items you obtain, and the biomes you visit. No manual entries, no datapack curation — just play, and watch your collection grow.

## Getting started

Craft the Bestiary Book with a **Book + Rotten Flesh** (shapeless). Right-click to open it. If you lose it, just craft another — your records are saved on you, not the book.

## What it records

### 🧟 Mobs
- Slay any mob to record it: **HP / Attack / Defense**, kill count, and an automatically calculated **rarity tier** (★ Common → ★★★★★ Legendary) based on its stats and boss status
- **Observed drops**: only drops you have actually seen are revealed — keep hunting to complete each mob's drop list. A "?" slot reminds you there may be more
- **Spawn biomes**: built by scanning every biome's spawn settings at world load, so it stays accurate even with biome-modifier mods. Mobs that never spawn naturally show "Appears under special conditions"
- Undiscovered mobs show as ??? — no spoilers

### 💎 Items
Pick up, craft, or smelt an item to record it, with first-obtained day and lifetime count.

### 🌲 Biomes
Enter a biome to record it, with first-visited day. Each biome page also lists **which creatures can spawn there** — great for tracking down that one missing mob.

## Works with every mod, automatically

Everything is driven by registries and events at runtime. Modded mobs, items and biomes are included in the bestiary (and in the completion percentage) with **zero configuration** — add or remove mods and the book adapts. Bosses from popular mods (Cataclysm, Twilight Forest, Aether, Mowzie's Mobs, BOMD, Iron's Spellbooks…) are pre-tagged for the boss rarity bonus.

## Made for long play

- Per-tab **completion percentage** — can you reach 100% in a 300+ mod pack?
- Search box and Found / Missing filters
- Rotating 3D mob preview in the detail panel
- Toast notifications on new discoveries
- Per-player data (multiplayer friendly), survives death

## Configuration

- `config/renribestiary-common.toml`: rarity thresholds, boss/modded bonuses, biome poll interval, toast on/off
- Datapack tags: `renribestiary:excluded` (entity_type / item / worldgen biome) to hide entries, `renribestiary:boss_like` to add bosses (missing IDs are safely ignored)

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*Requires NeoForge 21.1+ on Minecraft 1.21.1. Required on both server and client.*