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  4. Obsidian Tyrant
Boss · Obsidian Citadel

Obsidian Tyrant

The Obsidian Tyrant sits on the Throne of Obsidian at the top of the Citadel: the toughest boss in the game.

3,224 health solo★★★Recommended level 12+Arena: Throne of ObsidianWeak to Shock

Health and damage by squad size

SquadHealthDamage per hit
1 player3,22494.9
2 players5,642104.3
3 players8,060113.8
4 players10,478123.3

The Obsidian Tyrant is in area 5 of Obsidian Citadel, and every area deeper into a map makes enemies a little tougher. In Boss Rush it comes back with 1.5× and then 2.2× this health.

Attacks

A boss chases the nearest player and hits hard up close. Every few seconds it warns with a flash (the warning is longer before a charge), then uses one of four attacks in turn. The lower its health, the more often it attacks.

Burst

Two rings of fire bolts in every direction, one right after the other. Find a gap or put up a shield.

Spray

A fan of shock bolts aimed at its target. Move sideways.

Charge

A fast dash in a straight line that hits everyone in its path hard. Watch the direction it flashes and step aside, or dodge through it.

Summon

Calls a pack of runners around it, more with a bigger squad.

The arena

Throne of Obsidian is the last area of Obsidian Citadel: clear the area before it and the gate opens. The boss is guarded by 2 packs (solo: 6 grunts, 4 spitters 2 brutes), and those packs may bring specials (Mender and Shieldbearer). Bigger squads face bigger packs and more specials.

On the map, the red dot is the boss and the green dot is where you start.

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Weaknesses

Weak to Shock: +25% damage. It resists Fire (40% less) and Frost (40% less). Shock guns like the Arc Pistol, Tesla Rifle and Storm Caster are the best tools for it.

Rewards

RewardAmount
XP for the kill (every player)500
Gold180–270, shared by the squad
Gun caseAlways, rolled one grade better than the map’s usual drops
Armour plate60%
Grenade and turret kitAlways
Augment Core45% for each player
Clearing the area450 XP and 150 gold
Winning the mission360 XP, 180 gold, a mod and a gun or suit

See loot and drops for the grade odds.

Tips

Other bosses

Outpost WarlordOvergrown Outpost · ★☆☆ · level 1+
Ruin ColossusSunken Ruins · ★★☆ · level 6+
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