Conquer BO7 Season 1 Endgame: Effortless Guide to Slaying Colossus & Z-Rex

Black Ops 7's Season 1 has supercharged Endgame mode on the sprawling Avalon map, turning co-op chaos into epic boss hunts that echo Zombies classics. Dropping December 4th, these World Events spawn randomly within 5-10 minutes, pitting squads against the colossal Origins Robot (aka Colossus of Avalon) or the rampaging Toxic Tyrant Z-Rex. No more endless grinding— these fights reward Exotic skill upgrades, massive Combat Rating jumps to 63, and exclusive loot that catapults your power. I've farmed Avalon relentlessly since launch, and with Combat Rating 60+ squads, these become repeatable milk runs. Perfect for solo carries or full fireteams chasing Dark Ops calling cards. Let's dismantle these behemoths step-by-step for consistent wins.

Endgame Essentials: Prep for Boss Domination

Endgame unlocks post-campaign, dropping you into Avalon's tiered zones (T1 outer safe havens to T4 nightmare cores). Boss events lock zones, spawning waves of zombies, guild robots, and specials. Aim for CR60+ for comfort—rewards shine here.

Stock up via contracts, toxin scavenging, and Tier 4 pushes. Mobility Exotics rule for repositioning.

Ultimate Loadouts: Gear That Melts Bosses

Legendary rocket launchers are non-negotiable—AOE shreds adds, bursts weak points. Pair with Exotics for sustain.

Tweak for playstyle: Tanks grab DR Exotics; DPS stack butterflies for explosions.

Colossus of Avalon: Hijack the Origins Robot

This BO2 throwback slams Avalon, shielding until you infiltrate. Nostalgic yet fresh—inside puzzles demand teamwork.

Phase Breakdown:

Add Clear (Pre-Spawn): Mow fear robots/zombies filling the progress bar. Rocket spam packs.

Drop & Dodge: Robot crashes—evade red stomp zones (insta-gib). Backpedal center.

Infiltrate: Foot hatch glows/opens post-step. Grapple/shoot entry (2-4 inside). Kill internal rhinos.

Puzzle Core: Multi-floor mayhem.

Stand firm on plate—energy surges cables to bulbs. Blast ALL lit ones in ~10s or cooldown (15s). Success: Shield drops.

DPS Windows: Outside unloads on glowing weak points/cores. Repeat until depleted.

Exfil Glory: Grapple head portal for cinematic eject—unlocks Dark Ops card.

Pro Tips: Comms like "Pulse lower left!" Inside: 1 plate, 2 shooters. Fail? Retry—no wipe penalty. CR60 Legendaries trivialize adds.

Toxic Tyrant Z-Rex: Portal Seal & Dino Rodeo

Shatter Veil's toxic terror—close rifts, then unload. Simpler but tankier; high ground owns it.

Phase Breakdown:

1. Shard Hunt: Slay elites for elemental shards. Ignore trash—focus drops.
2. Portal Purge: 10 sky rifts (1-4 shards each). Carrier to ground marker—deposit seals. Fan out: Protect sealers.
3. Spawn & Siege: All closed? Z-Rex erupts. Head/eyes weak spot—rooftops draw aggro safely.
4. Rodeo Optional: Tail slam—rush rear, interact to mount (damage boost, fun emote).
5. DPS Grind: Rockets to face; evade chomps/breaths/tail. ~17-min timer—reposition via cover.

Attack Table:

Pro Tips: Seal priority > kills. Ride for style points/Dark Ops. Solo viable CR60+ but squads 2x faster.

Epic Rewards: Exotics, Ratings & Brags

Victories drop loot crates—pick one Exotic to upgrade (3 levels max). CR +3 to 63 unlocks Tier 4 supremacy. Dark Ops: Robot exfil card, Z-Rex cowboy ride.

Stack upgrades across runs—god-tier power.

Accelerate Your Grind: Bot Lobbies & Builds

Endgame demands geared squads—farm MP XP/camos fast with bot lobbies. Buy BO7 Bot Lobby for effortless levels. Deeper strats? Check U4GM's Season 1 Endgame Boss Strategies.

Avalon's bosses deliver pure adrenaline—master them, climb leaderboards. Squad up and smash! What's your fastest clear? Sound off below.