Boss

Copper Monstrosity

  • Story
  • Rematch
Rainy Plains

Quick counter

Weak to

  • Poison1.5×

Resists

  • Lightning0.65×

This boss takes increased damage from Poison.

Copper Monstrosity
Base HP
2,400
Poise
1,200
Speed
4 blocks/s
Base attack damage
30
Souls
200
Open Matchup Checker

How to beat it

How to Beat Copper Monstrosity

Quick Fight Plan

  1. This boss takes increased damage from Poison.
  2. Damage from Lightning is reduced.
  3. If your current build leans on Lightning, changing damage direction usually matters more than raising Item Power.
  4. It brings reinforcements (Shockwave, Summons reinforcements), so clear the adds before they stack up.
  5. Watch for Projectile, its most dangerous recorded attack.
  6. Encountered in: Wading Rainy Plains

Every line above is generated from the published boss data, not from an untested tactic.

Before You Fight

  • Check its damage weakness
  • Equip a damage option that matches
  • Review the encounter quest
  • Prepare healing and survival options

Boss

Key stats

Base HP
2,400

Base game-data value used for comparison. Encounter scaling can change with progression and difficulty.

Poise
1,200
Speed
4 blocks/s
Base attack damage
30

Highest base attack damage recorded. Damage you actually take depends on difficulty and gear.

Souls
200

Damage type finder

Damage Matchups

Which damage types are stronger or weaker against this boss. Missing entries deal normal damage.

Weak

  • Poison1.5×

Resist

  • Lightning0.65×

Normal

8 damage types

  • Melee
  • Ranged
  • Fire
  • Frost
  • Soul
  • Blast
  • TNT
  • Elemental

Damage types without an entry deal normal damage (×1.0).

Open Matchup Checker

Attack data

Attacks to watch

Every recorded attack with its base damage, damage type, reach and cooldown.

  • Projectile

    Base damage
    30 ×3
    Damage type
    Ranged
    Reach
    30 blocks
    Cooldown
    10 sec
  • Heavy melee

    Base damage
    30
    Damage type
    Melee / Soul
    Reach
    10 blocks
    Cooldown
    10 sec
  • Charge or dash

    Base damage
    25
    Damage type
    Melee
    Reach
    5.5 blocks
    Cooldown
    6 sec
  • Melee combo

    Base damage
    10
    Damage type
    Melee
    Reach
    10 blocks
  • Charge-up

    Cooldown
    20 sec

Danger is not only damage. A 30 ×3 volley at 30 blocks is a different threat from a 90 damage short-range slam.

Boss mechanics

Summons, shields, heals and other abilities change the fight, so they are kept apart from attacks.

  • Shockwave
  • Summons reinforcements

Encounter

Where You Fight Copper Monstrosity

Encountered in

Wading Rainy Plains

See Full Quest Walkthrough →

Rewards

Rewards and farming

First-clear rewards stay separate from repeatable rewards, so you can see what is worth replaying.

First completion

Repeatable rewards

Observed reward context only. Specific item drop odds are not published.

Rematches

Fight This Boss Again

A revived boss is the same boss with a harder encounter, so it keeps the same boss page.

Rematch

The Copper Monstrosity Revived

Rematch Quest

Prepare a build

Build for this boss

Useful direction

  • Poison 1.5×

Avoid relying on

  • Lightning 0.65×
Build for Copper Monstrosity

Keep going

What Happens After This Fight