Here you can create your own damage types and modify the existent ones.

# Damage identifier. Must be unique.
physical:
  # Attribute priority. Higher value will override.
  # Damage attribute with the highest priority will be defined as a default damage type.
  priority: 100
  # Localized name.
  name: Physical Damage
  # Lore format.
  # Placeholders:
  # - %name% - Attribute name.
  # - %value% - Formatted attribute value. All attribute formats are in - ENGINE CONFIG -.
  format: '&6⚔ %name%: &f%value%'
  # Vanilla damage causes attached to this damage attribute.
  # This means, each time when entity gets damage from specified cause it will be count as a damage from current damage attribute,
  # that will affect all damage type settings.
  # All Bukkit Damage Causes are - HERE -.
  attached-damage-causes:
  - ENTITY_ATTACK
  # Custom actions that will be executed when damage from this damage type is proceed.
  # See - HERE - for Custom Actions Engine tutorial and examples.
  on-hit-actions: {}
  # Multiplies the damage by specified value, if damage receiver is in specified biome.
  # All Biomes are - HERE -.
  biome-damage-modifier:
    PLAINS: 1.0
    DESERT: 1.25
  # Multiplies the damage by specified value, if damage receiver is specified entity.
  # All Entity Types are - HERE -.
  entity-type-modifier:
    PIG: 1.0
  # Multiplies the damage by specified value, if MythicMob is in specified faction.
  mythic-mob-faction-modifier:
    faction: 1.0

magical:
  priority: 10
  name: Magical Damage
  format: '&d⚡ %name%: &f%value%'
  attached-damage-causes:
  - ENTITY_ATTACK
  on-hit-actions: {}
  biome-damage-modifier:
    PLAINS: 1.0
  entity-type-modifier:
    PIG: 1.0
  mythic-mob-faction-modifier:
    faction: 1.0

fire:
  priority: 10
  name: Fire Damage
  format: '&c☀ %name%: &f%value%'
  attached-damage-causes:
  - ENTITY_ATTACK
  on-hit-actions: {}
  biome-damage-modifier:
    PLAINS: 1.0
    NETHER: 1.25
  entity-type-modifier:
    PIG: 1.0
  mythic-mob-faction-modifier:
    faction: 1.0

poison:
  priority: 10
  name: Poison Damage
  format: '&a☣ %name%: &f%value%'
  attached-damage-causes:
  - ENTITY_ATTACK
  on-hit-actions: {}
  biome-damage-modifier:
    PLAINS: 1.0
    SWAMPLAND: 1.25
  entity-type-modifier:
    PIG: 1.0
  mythic-mob-faction-modifier:
    faction: 1.0

water:
  priority: 10
  name: Water Damage
  format: '&9⚓ %name%: &f%value%'
  attached-damage-causes:
  - ENTITY_ATTACK
  on-hit-actions: {}
  biome-damage-modifier:
    PLAINS: 1.0
    OCEAN: 1.25
  entity-type-modifier:
    PIG: 1.0
  mythic-mob-faction-modifier:
    faction: 1.0

wind:
  priority: 10
  name: Wind Damage
  format: '&7⚕ %name%: &f%value%'
  attached-damage-causes:
  - ENTITY_ATTACK
  on-hit-actions: {}
  biome-damage-modifier:
    PLAINS: 1.0
  entity-type-modifier:
    PIG: 1.0
  mythic-mob-faction-modifier:
    faction: 1.0