Leklai

A barebone RPG framework mod for Minecraft Fabric ~~1.21.1~~ 1.21.11 that rips out vanilla damage and rebuilds it from scratch. Ragnarok Online meets Black Desert — stat allocation, class evolution, skill chaining, and a full elemental damage pipeline. No fluff, just systems.

This is a mod release. Only the Novice class and Basic Skill are implemented. Everything else is scaffolding stuff are create via datapacks and the API.

What This Mod Does?

Replaces Vanilla Damage Entirely

The entire damage calculation is change, the armor are little more weak before ~80% at full diamond after 50% reduction

RPG Systems

Stats (Ragnarok Online Style)

Six stats: STR, AGI, VIT, INT, DEX, LUK

Levels

Two-tier leveling:

Base Level (1–99): Earns stat points for character growth
Class Level (1–50, varies): Earns class points for skill learning

XP curves are fully configurable in server config. Death penalty (10% XP loss by default) is toggleable and customable percentage.

Classes (Datapack-Driven)

Tier system: Novice → 1st Class → 2nd Class → Transcendent

Evolution: Novice evolves at class level 10 with maxed Basic Skill. Higher tiers evolve at level 45 with all class points spent.
Transcendence: Resets class level to 1, wipes stats, grants 4× starting stat points. You lose everything but come back stronger.
All class data lives in datapacks — tiers, branches, attribute modifiers, growth factors, job bonuses, resource pools.

Currently implemented: Novice only. The framework is here, the content is on you.

Skills (Black Desert Style)

Three skill types:

Castable: Press-to-cast with windup → active → recovery phases
Holdable: Charge-and-release with hold animations and forced release timeout
Passive: it do nothing just flag for apply attribute modifiers

Skill chaining: Recovery windows allow chaining into the next skill's active phase, skipping windup. Build combos.

Skills have prerequisites, resource costs, cooldowns, damage profiles (element + combat type), and bind to 8 hotkey slots.

(Novice passive — unlocks party features and class evolution). other mod are adding the skill via coding

Party System

Up to 4 players (configurable). Create, invite, kick, transfer leadership. Health and resource bars sync to all members every second. Requires Basic Skill level 5+ to join, 7+ to create, and it have distance penalty if player are far away it less exp gain.

Resource System

Per-class resource pool (SP/MP equivalent). Base 10 + class growth scaling. Regenerates on a timer — faster when sitting, passive regen when idle. Skills consume resources.

Vanilla Changes

Changed	Detail
Damage calculation	Completely replaced with 8-stage pipeline
Armor toughness	Removed
Food healing	Disabled by default
Enchantments	Still work, applied after custom pipeline
Environment damage	Rebalanced (rain/thunder penalties)
Entity collision	Toggleable

Configuration

Server config (leklai_server.json5) controls:

Max level, starting stat points, XP curves
Max party size, max stat value
Death penalty toggle and percentage
Skill unlearning toggle
Food healing, collision, environment damage rebalance

Client config (leklai_client.json5) controls:

AAll UI stuff
The damage indicator YACL config screen included via ModMenu.

PlateauLib (Internal lib) and Cardinal Components API are bundled — no separate install needed. since I'm currently maintain one mod I don't think it need to separate plateaulib since it just simple attributes registry stuff and the ui rework from the penomior.