Home

ItemCore Wiki

| Paper 1.21.x | This wiki is translated by AI. Please excuse any errors.

📑 Table of Contents

1. Introduction
2. Installation and Configuration
3. Command System
4. Permission System
5. Item Creation
6. Attribute System
7. Element System
8. Damage System
Expansion 1 Skill System (ItemCoreMythic)
Appendix 1 PlaceholderAPI Placeholders
Appendix 2 Developer API
FAQ

1. Introduction

ItemCore is a concise and focused item library plugin, featuring the ability to freely add expansion plugins to enrich plugin functionality.

Below are expansion plugins that are already or planned to be developed

Plugin	Purpose
ItemCoreMythic	MythicMobs expansion
ItemCoreForge	RPG expansion
ItemCoreRPG	Forging expansion
ItemCoreTrinkets	Trinket expansion

Core Features:

Full configurability
Unique element system (element accumulation/ailment mechanism)
Real-time update of player item lore and attributes

2. Installation and Configuration

2.1 Installation Steps

Place ItemCore.jar into the plugins/ directory
Restart the server
The plugin will automatically generate the configuration file structure on first startup:

plugins/ItemCore/
├── config.yml              # Main configuration
├── attributes.yml          # Attribute global parameters
├── messages.yml            # Message configuration
├── categories.yml          # Category configuration
├── elements.yml            # Element configuration
├── ailments.yml            # Ailment configuration
├── items/                  # Item configuration directory
│   ├── weapons.yml
│   ├── armors.yml
│   └── ...
├── tooltip/
│   ├── lore.yml            # Lore layout
│   └── stats.yml           # Attribute display format

3. Command System

3.1 Main Command `/ic`

Subcommand	Purpose	Permission
`open`	Open item library GUI	`itemcore.command.gui`
`give <player> <item> [amount]`	Give item	`itemcore.command.give`
`reload`	Hot reload all configurations	`itemcore.command.reload`
`help`	Show help	`itemcore.command.help`

Examples:

/ic open                       # Open item library
/ic give Is_Lianhua iron_sword # Give item
/ic reload                     # Reload configuration

4. Permission System

Permission Node	Default	Description
`itemcore.admin`	OP	Admin permission (includes all below)
`itemcore.command.give`	OP	Give item
`itemcore.command.reload`	OP	Reload configuration
`itemcore.gui.obtain`	OP	Obtain item from GUI
`itemcore.gui.gui`	OP	Open item GUI
`itemcore.command.help`	Everyone	View help

5. Item Creation

Create items in category files under the items/ folder, such as weapons.yml.

Complete configurable items:

Configuration	Type	Default	Description
`material`	Material name	Required	Item material
`type`	String	-	Temporarily unused
`display-name`	String	—	Display name (supports `&` color codes)
`lore`	List	—	Item description
`attributes`	Map	—	Attribute configuration
`enchantments`	Map	—	Enchantments
`item-flags`	List	—	Item flags
`unbreakable`	Boolean	false	Whether unbreakable
`max-stack`	Integer	Vanilla rules	Maximum stack size
`custom-model-data`	Integer	—	Custom model data
`active-slots`	List	any	Active equipment slots
`effects`	List	—	Potion effects
`keep-on-death`	Boolean	false	Whether to keep on death
`skills`	List	—	Skill configuration (requires ItemCoreMythic)

Configuration Supplement

active-slots:
  - main-hand  # Main hand
  - off-hand   # Off hand
  - head       # Head
  - chest      # Chest
  - legs       # Legs
  - feet       # Feet
  - any        # All
item-flags:
  - HIDE_ATTRIBUTES   # Hide attributes (will directly remove vanilla attributes)
  - HIDE_ENCHANTS    # Hide enchantments
  - HIDE_UNBREAKABLE  # Hide unbreakable
  - HIDE_POTION_EFFECTS  # Hide potion effects

Example - Complete Item:

fire_sword:
  material: DIAMOND_SWORD
  type: weapons
  display-name: "&cFlame Sword"
  lore:
    - "&7Flame sword that burns everything"
  enchantments:
    sharpness: 3
    fire_aspect: 2
  item-flags:
    - HIDE_ATTRIBUTES
  unbreakable: true
  active-slots:
    - main-hand
  attributes:
    ATTACK_DAMAGE: 12
    ATTACK_SPEED: 1.6
    CRIT_CHANCE: 15
    CRIT_DAMAGE: 30
    PHYSICAL_PENETRATION: 5
  skills:
    Right_Click:
      skill: fireball
      provider: mythicmobs

6. Attribute System

6.1 Complete Attribute List

Attack Class:

Config Key	Display Name	Percentage	Description
`ATTACK_DAMAGE`	Attack Damage	—	Base attack power, directly added to damage
`ATTACK_SPEED`	Attack Speed	—	Final attack speed value (e.g., `1.6` = iron sword speed)
`ATTACK_RANGE`	Attack Range	—	Attack distance bonus
`KNOCKBACK`	Knockback	—	Knockback bonus
`CRIT_CHANCE`	Crit Chance	%	Critical strike probability
`CRIT_DAMAGE`	Crit Damage	%	Extra crit multiplier (total crit = default 150% + this value)

Spell/Damage Type:

Config Key	Display Name	Percentage	Description
`SPELL_POWER`	Spell Power	—	Spell damage base value
`PHYSICAL_DAMAGE`	Physical Bonus	%	Physical damage percentage bonus
`SPELL_DAMAGE`	Spell Bonus	%	Spell damage percentage bonus
`PROJECTILE_DAMAGE`	Projectile Bonus	%	Projectile damage percentage bonus
`ADAPTIVE_FORCE`	Adaptive Force	—	Automatically converts to attack or spell power (whichever is higher)

Defense Class:

Config Key	Display Name	Percentage	Description
`PHYSICAL_RESIST`	Physical Resistance	—	Physical damage reduction (configurable formula)
`SPELL_RESIST`	Spell Resistance	—	Spell damage reduction (configurable formula)
`ARMOR`	Armor	—	Vanilla armor value
`DAMAGE_REDUCTION`	Damage Reduction	%	Final percentage damage reduction (can be negative)

Penetration Class:

Config Key	Display Name	Percentage	Description
`PHYSICAL_PENETRATION`	Physical Penetration	—	Fixed value physical penetration
`PHYSICAL_PENETRATION_PERCENT`	Physical Penetration	%	Percentage physical penetration
`SPELL_PENETRATION`	Spell Penetration	—	Fixed value spell penetration
`SPELL_PENETRATION_PERCENT`	Spell Penetration	%	Percentage spell penetration

Survival Class:

Config Key	Display Name	Percentage	Description
`HEALTH`	Health	—	Extra health (base 20 points)
`MOVEMENT_SPEED`	Movement Speed	—	Extra movement speed (base 0.1)
`REGENERATION`	Life Regeneration	—	Health regeneration per second
`LUCK`	Luck	—	Luck bonus

All percentage attributes are filled directly as integers:

CRIT_CHANCE: 30    # ✅ Correct = 30%
CRIT_DAMAGE: 50    # ✅ Correct = 50%
PHYSICAL_DAMAGE: 10  # ✅ Correct = 10%

7. Element System

7.1 Default Elements

Element ID	Display Name	Icon	Color	Ailment Effect
`LIUHUO`	Fire	`🔥`	`&c`	Burning: Lasts 8 seconds, 2% current health damage per second
`HANSHUANG`	Frost	`❄️`	`&b`	Weakness: Lasts 4 seconds, physical/spell resistance -30%
`LEIZHE`	Thunder	`⚡`	`&e`	Vulnerability: Lasts 6 seconds, element resistance -25%

7.2 Element Accumulation

# elements.yml
LIUHUO:
  display: "&cFire"
  icon: '🔥'
  color: '&c'
  threshold: 30           # Accumulation threshold, triggers ailment when reached
  decay-per-second: 1     # Decay per second when no elemental damage
  accumulation:
    mode: DAMAGE_PERCENT  # DAMAGE_PERCENT / FIXED / ATTRIBUTE
    value: 0.5            # Each damage = damage value × 50% accumulation
    allow-sources:
      - ATTACK
      - SKILL
  ailment: LIUHUO_DOT     # Associated ailment ID (see ailments.yml)

Accumulation Modes:

DAMAGE_PERCENT: Accumulation = damage × value
FIXED: Fixed accumulation of value each time
ATTRIBUTE: Based on attribute value × multiplier

7.3 Ailment Configuration

# ailments.yml
LIUHUO_DOT:
  display: "&cFire"
  duration: 160           # 160 ticks = 8 seconds
  refresh-policy: RESET   # RESET / STACK / IGNORE / REPLACE
  triggers:
    - type: DAMAGE_PERCENT
      value: 0.02         # 2% current health
      interval: 20        # Triggers once per second

HANSHUANG_WEAKEN:
  display: "&bFrost"
  duration: 80
  refresh-policy: RESET
  triggers:
    - type: ATTRIBUTE_MOD
      attribute: PHYSICAL_RESIST
      value: -0.3         # Physical resistance -30%
    - type: ATTRIBUTE_MOD
      attribute: SPELL_RESIST
      value: -0.3         # Spell resistance -30%

LEIZHE_BREAK:
  display: "&eThunder"
  duration: 120
  refresh-policy: RESET
  triggers:
    - type: RESISTANCE_REDUCTION
      value: -0.25        # All element resistance -25%

Trigger Types:

DAMAGE_PERCENT — Deal percentage damage of that element
DAMAGE_FIXED — Fixed value damage of that element
ATTRIBUTE_MOD — Temporarily modify target attribute
RESISTANCE_REDUCTION — Reduce element resistance
POTION_EFFECT — Apply potion effect

7.4 Expanding Custom Elements

Register in code:

ItemCore.getInstance().getElementRegistry()
    .register(new ElementType("ARCANE", "Arcane"));

Configure corresponding accumulation/ailment rules in elements.yml and ailments.yml.

8. Damage System

8.1 Damage Types

Type	Tag	Description
Physical	`PHYSICAL`	Default attack type, affected by physical bonus/physical resistance
Spell	`SPELL`	Default skill type, affected by spell bonus/spell resistance
Projectile	`PROJECTILE`	Projectile damage, affected by projectile bonus

8.2 Damage Calculation Process

Original damage
  → Attack type tag (PHYSICAL/SPELL/PROJECTILE)
  → Crit check (CRIT_CHANCE → CRIT_DAMAGE)
  → Damage type percentage bonus (PHYSICAL_DAMAGE%, etc.)
  → Penetration calculation (percentage first or fixed first)
  → Resistance reduction (only non-elemental damage is affected by physical/spell resistance)
  → Element resistance reduction (only elemental damage is affected)
  → Damage reduction DAMAGE_REDUCTION% (final damage reduction)
  → Element accumulation
  → Final damage

8.3 Elemental Damage Rules

Damage with element type skips physical/spell resistance calculation
Only affected by element resistance and DAMAGE_REDUCTION
When element resistance is negative, it becomes vulnerability bonus

8.4 Damage Reduction Priority

DAMAGE_REDUCTION is final damage reduction, affecting all damage (including elemental damage), calculated叠加 with physical resistance/spell resistance/element resistance.

Expansion 1 Skill System (ItemCoreMythic)

1.1 Skill Configuration

# In item configuration
skills:
  Right_Click:
    skill: fireball
    provider: mythicmobs
  Left_Click:
    skill: slash
    provider: mythicmobs
  Timer:
    skill: regen
    provider: mythicmobs
    duration: 20

1.2 Skill Trigger Types

Trigger Type	Description
`Right_Click`	Right-click trigger
`Left_Click`	Left-click trigger
`Timer`	Timer, `duration` = interval ticks

1.3 ICDamageMechanic

Custom damage can be used in MythicMobs skills:

Skills:
- icdamage{amount="<ic.attack_damage> * 2",type=physical,element=LIUHUO,penetration=5,crit=true} @EIR{r=5}

Parameters:

Parameter	Alias	Default	Description
`amount`	`a`	`1`	Damage formula, supports `<ic.xxx>` placeholders and mathematical operations
`type`	`t`	`physical`	Damage type: `physical` / `spell` / `projectile`
`element`	`e`	`none`	Element type: `LIUHUO` / `HANSHUANG` / `LEIZHE`
`crit`	`c`	`true`	Whether can crit
`attacktype`	`at`	`skill`	Attack type: `skill` / `attack`
`penetration`	`p`	`0`	Extra penetration value
`lifesteal`	`ls`	`0`	Lifesteal ratio

Mathematical Operation Support:

<ic.spell_power> * 0.5        # 50% spell power
<ic.attack_damage> * 2 + 10  # Attack power × 2 + 10
<ic.attack_damage> * 50%     # 50% attack power

1.4 active-slots Scope of Influence

active-slots configuration controls:

Attributes: Equipment slot determines whether active
Skills: Main hand/off hand configuration determines skill trigger
Potion Effects: Equipment slot determines whether to grant potion effects

Appendix 1 PlaceholderAPI Placeholders

Placeholder	Description
`%itemcore_attack_damage%`	Attack damage
`%itemcore_attack_speed%`	Attack speed
`%itemcore_attack_range%`	Attack range
`%itemcore_health%`	Current health
`%itemcore_max_health%`	Maximum health
`%itemcore_movement_speed%`	Total movement speed
`%itemcore_regeneration%`	Life regeneration
`%itemcore_knockback%`	Knockback
`%itemcore_luck%`	Luck
`%itemcore_spell_damage%`	Spell bonus
`%itemcore_physical_damage%`	Physical bonus
`%itemcore_projectile_damage%`	Projectile bonus
`%itemcore_spell_power%`	Spell power
`%itemcore_adaptive_force%`	Adaptive force
`%itemcore_crit_chance%`	Crit chance
`%itemcore_crit_damage%`	Crit damage
`%itemcore_physical_resist%`	Physical resistance
`%itemcore_spell_resist%`	Spell resistance
`%itemcore_physical_penetration%`	Physical penetration
`%itemcore_physical_penetration_percent%`	Percentage physical penetration
`%itemcore_spell_penetration%`	Spell penetration
`%itemcore_spell_penetration_percent%`	Percentage spell penetration
`%itemcore_damage_reduction%`	Damage reduction

Appendix 2 Developer API

1. Get API Instance

import com.minemart.itemcore.api.ItemCoreAPI;

// Get player attributes
AttributeContainer attrs = ItemCoreAPI.getPlayerAttributes(player);
double attackDamage = attrs.getAttribute(CustomAttribute.ATTACK_DAMAGE);

// Get item
CustomItem item = ItemCoreAPI.getCustomItem("legendary_blade");

// Get categories
Collection<ItemCategory> categories = ItemCoreAPI.getCategories();

// Process custom damage
DamageRequest request = DamageRequest.builder()
    .attacker(attacker)
    .victim(victim)
    .baseDamage(100)
    .damageType(DamageTag.SPELL)
    .element(ElementType.LIUHUO)
    .canCrit(true)
    .attackType(AttackType.SKILL)
    .build();
ItemCoreAPI.processDamage(request);

2. Register Custom Element

ItemCore.getInstance().getElementRegistry()
    .register(new ElementType("ARCANE", "Arcane"));

FAQ

Q: Do I need to restart the server after modifying the configuration? A: /ic reload can hot reload, no need to restart.

Q: Why aren't attributes working? A: Check active-slots configuration. Items must be in the specified equipment slot to work.

Q: How are attributes from multiple equipment calculated? A: Attributes with the same name are automatically accumulated. If two pieces of equipment both have ATTACK_DAMAGE: 10, the final result is +20.

Q: Why does crit damage show 200%? A: CRIT_DAMAGE is an extra bonus. Total crit = default value (150%) + CRIT_DAMAGE. The default value can be modified in attributes.yml.

Q: How to configure attack speed? A: Write the final value directly. ATTACK_SPEED: 1.6 = iron sword speed. ATTACK_SPEED: 4.0 = extremely fast.

Q: How to write percentage attributes? A: Fill in integers directly. CRIT_CHANCE: 30 = 30%, not 0.3.

Q: What is adaptive force used for? A: Automatically converts to corresponding bonus based on whichever is higher between attack/spell power. Conversion rate is configured in attributes.yml.

Q: How is elemental damage calculated? A: Damage with element skips physical/spell resistance, only affected by element resistance and damage reduction.

Q: How to make item skills trigger? A: Install ItemCoreMythic, configure skills in the skills node of item configuration, ensure active-slots includes main-hand.

Q: Why is attack speed incorrect for items taken in creative mode? A: This is a mechanism issue with Minecraft creative mode inventory, normal in survival mode or obtained via command.

123

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Home

ItemCore Wiki

📑 Table of Contents

1. Introduction

2. Installation and Configuration

2.1 Installation Steps

3. Command System

3.1 Main Command `/ic`

4. Permission System

5. Item Creation

6. Attribute System

6.1 Complete Attribute List

7. Element System

7.1 Default Elements

7.2 Element Accumulation

7.3 Ailment Configuration

7.4 Expanding Custom Elements

8. Damage System

8.1 Damage Types

8.2 Damage Calculation Process

8.3 Elemental Damage Rules

8.4 Damage Reduction Priority

Expansion 1 Skill System (ItemCoreMythic)

1.1 Skill Configuration

1.2 Skill Trigger Types

1.3 ICDamageMechanic

1.4 active-slots Scope of Influence

Appendix 1 PlaceholderAPI Placeholders

Appendix 2 Developer API

1. Get API Instance

2. Register Custom Element

FAQ

Uh oh!

Clone this wiki locally

Home

ItemCore Wiki

📑 Table of Contents

1. Introduction

2. Installation and Configuration

2.1 Installation Steps

3. Command System

3.1 Main Command /ic

4. Permission System

5. Item Creation

6. Attribute System

6.1 Complete Attribute List

7. Element System

7.1 Default Elements

7.2 Element Accumulation

7.3 Ailment Configuration

7.4 Expanding Custom Elements

8. Damage System

8.1 Damage Types

8.2 Damage Calculation Process

8.3 Elemental Damage Rules

8.4 Damage Reduction Priority

Expansion 1 Skill System (ItemCoreMythic)

1.1 Skill Configuration

1.2 Skill Trigger Types

1.3 ICDamageMechanic

1.4 active-slots Scope of Influence

Appendix 1 PlaceholderAPI Placeholders

Appendix 2 Developer API

1. Get API Instance

2. Register Custom Element

FAQ

Uh oh!

Clone this wiki locally

3.1 Main Command `/ic`