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Saxum are bipedal, medium-sized assailants capable of short-ranged attacks and a powerful grand slam in melee.

The Deimos Saxum is a large bipedal Infestation b.svg Infested enemy that resides in the Cambion Drift, Deimos.


In addition to releasing projectiles from its shoulders that deal lingering area of effect, the Saxum can do powerful slams using its enlarged "belly".

The Saxum is immune to Status Effects until both its shoulders, called Femurs, are destroyed. This also removes its ability to launch controlled projectiles, forcing it to rely on melee attacks. However, doing so will cause its broken shoulders to endlessly spew DmgCorrosiveSmall64.png Corrosive bomblets that travel up to 15 meters from it until it dies. It will also take heavy damage over time in this state, effectively bleeding out. Given its extensive toughness otherwise, destroying its shoulder Femurs is in fact the easiest way to kill a Saxum.

After not taking damage for 10 seconds, the Saxum will start to regenerate 2% of max health per second.

Has immunity to DmgViralSmall64.png Viral status.

The Deimos Saxum has no "head" hitbox.

The Deimos Saxum Rex releases Deimos Tendril Drones from its shoulders, in addition of shooting projectiles.

Damage Reduction[]

Deimos Saxum possess Damage Reduction that scales depending on your weapon's DPS excluding critical hits. DPS is calculated by

Critical Hits are applied after the damage resistance is calculated. Additionally, the average DPS is calculated using all health/shield modifiers, other sources of damage reduction, and is quantized.

Until both Femurs are destroyed, the main body possesses an additional 80% damage resistance. After destroying a Femur, the other one will take 2x damage. After destroying the other, both locations will take 2x damage.

For proc damage, critical hits are taken into account.

Where the proc damage is the per tick damage of the corresponding proc, with health/shield/armor modifiers taken into account. Note that unlike the DPS controller for normal damage, the one for proc damage takes critical hits into account. For heat procs, the proc damage in the above formula is the accumulated value of all the previous heat procs.


Deimos Saxum Rex General Miscellaneous
Introduced Update 29.0 (2020-08-25)
Mission Cambion Drift, Assassination Bounty Codex Scans 3
Weapon Shoulder projectiles
Slam Attack
Other Drops Leaping Thrasher Sigil
Statistics Mod Drops Mod TT 20px.png Saxum Thorax 7.588%
Mod TT 20px.png Saxum Carapace 2.211%
Mod TT 20px.png Saxum Spittle 0.201%
Fossilized 1200
DmgSlashSmall64.png +DmgBlastSmall64.png ++DmgCorrosiveSmall64.png +++DmgColdSmall64.png -DmgToxinSmall64.png ‐‐DmgRadiationSmall64.png ‐‐‐
Infested Sinew 200 (Armor)
DmgPunctureSmall64.png +DmgColdSmall64.png +DmgRadiationSmall64.png ++DmgBlastSmall64.png ‐‐
Base Level 1
Saxum Rex are larger, meaner Saxum and represent a considerably enhanced threat. How they achieve this evolution is unknown, but cannibalism is suspected.


  • Deimos Saxum was first revealed in TennoCon 2020 under the name Infested Femur.
  • The Deimos Saxum Rex only appears as an assasination target in Cambion Drift Bounties.


Patch History[]

Update 29.1 (2020-09-17)

  • Fixed ability to apply Status Effects to the Deimos Saxum before Femurs have been broken. Femurs must be destroyed first before Status Effects will affect the Saxum.
  • Fixed inability to spawn Deimos Saxum/Deimos Saxum Rex in the Simulacrum.

Hotfix 29.0.7 (2020-09-03)

  • Fixed stacking Deimos Saxum FX for Clients - should be easier to see around these boys now!

Update 29.0 (2020-08-25)

  • Introduced.