Combat Initiation Doombringer Guide

As the final wall standing between you and victory in Act 1, the combat initiation doombringer is widely considered the ultimate test of a player's mechanical skill. Encountered at the climax of Wave 50 in "The Doomspires," this mechanical juggernaut guards the gates of the Banlands with ruthless precision. To survive the combat initiation doombringer encounter, you must master the art of parrying, aerial movement, and resource management. This guide breaks down the meta strategies needed to conquer the combat initiation doombringer and claim your X-Rank.

Core Mechanics & Combat Phases

The combat initiation doombringer does not fight alone; he utilizes complex defensive layers that players must systematically dismantle.

The Damage Cap: Unlike other bosses, the combat initiation doombringer has a strict 2,500 damage cap. This means high-alpha weapons like giant bombs are inefficient. Success requires consistent, multi-hit DPS combinations.
Crystal & Chain Defense: Before you can damage his core, you must destroy his floating crystals. Pro-tip: Breaking a crystal instantly resets your cooldowns (like the Slingshot Alt), allowing for relentless pressure on the combat initiation doombringer.
Iconic Presence: His entrance is signaled by the chilling line: "Justice condemns you DEAD. LET THE TERMINATION COMMENCE." When you hear this, prepare for high-intensity bullet hell.

The Best Loadouts for combat initiation doombringer

To bypass his defense, you need a specialized "Boss Shredder" build. Here are the top-tier setups:

1. The All-Rounder (Reliable X-Rank Build)

Katana: Your primary survival tool for the combat initiation doombringer fight. Use it to parry his homing red daggers and axe swings for massive reflected damage.
Slingshot: Essential for "Sling-shot jumping" to maintain height. The Alt-fire is perfect for sniping defensive crystals.
Multi Rocket: The most efficient way to lock onto multiple chains and shells simultaneously.
Ninja Stars: Pair these with the Katana for the Rebound mechanic (LMB+F). This generates piercing damage that bypasses the combat initiation doombringer single-hit damage cap.

2. The Speedrunner’s "Shield-Breaker" Build

Flamethrower: Due to the massive hitbox of the combat initiation doombringer, the fire’s multi-hit ticks melt his health bar rapidly.
Grenade Launcher: Master "Parry-nading" (launching a grenade and immediately parrying it) to create localized explosions on his crystal base.
Grapple Hook: Non-negotiable for mobility. Use it to swing behind the combat initiation doombringer when he triggers his full-screen fire pillars.

Pro Tactics for Wave 50

Stay Airborne: Never stay on the ground for more than 3 seconds. Use Pogo tech (bouncing off projectiles/mobs) to stay above his shockwaves.
Listen for Cues: When the combat initiation doombringer shouts "DIE" or "JUDGEMENT" (a nod to Minos Prime), be ready to tap F for a perfect parry.
The Trowel Safety Net: If you are a beginner, bring the Trowel. Building a quick wall can block homing daggers, giving you a vital window to heal.