Arsenal.

The Astartes carries a Thunder Hammer or a Chainsword, along with a Bolter, and a Heavy Bolter or a Flamer.

Betcher's Gland.

The Astartes can use the Poison Spit action.

Catalepsian Node.

The Astartes can go 7 Days without Sleep before suffering 1 level of exhaustion.

Cumbersome.

The Astartes can either hold a Chainsword and a Bolter, or a Thunder Hammer, Flamer, or Heavy Bolter. The only weapons it can duel wield are the Chainsword and Bolter.

Indomitable (3/day).

The Astartes can reroll a saving throw it fails. It must use the new roll.

Laramann's Implant.

The Astartes's wounds close almost immediately from clotting, it is immune to Bleed damage.

Lymann's Ear.

The Astartes has advantage on Perception Checks requiring Hearing. In Addition, the Astartes is Immune to being Dizzied.

Melanchrome Implant.

The Astartes is Resistant to Radiant Damage.

Multi-Lung.

The Astartes has advantage on saving throws against Toxic gasses. In addition, the Astartes is resistant to suffocation damage.

Neuroglottis.

The Astartes can Identify the Core Elemental Components of the things they consume, and can roll a Survival Check with Advantage to determine every ingredient of something they have eaten.

Occulobe.

The Astartes gains darkvision up to 60 feet. In addition, the Astartes gains advantage on Perception Checks requiring Sight.

Omophagea.

When an Astartes eats the flesh of a creature that has died within the last 24 hours, it can experience prophetic memories of what life that created lived. The Astartes can do this once per day.

Oolictic Kidney.

The Astartes is Immune to being Intoxicated and Poisoned.

Pack Tactics.

The Astartes has advantage on an attack roll against a creature if at least one of the Astarte's allies is within 5 feet of the creature and the ally isn't incapacitated.

Preomnor Implant.

The Astartes is immune to poisons ingested by the mouth.

Second Heart.

The Adeptus Astartes has two hearts. It can survive suffocation for twice as long as it normally would be able to.

Sus-An Membrane.

The Astartes can enter a state of Suspended animation. In this state, they are considered Unconcious. While in this state, the Astarte's cannot take damage from Starvation, Thirst, or Age, and can survive for upwards of 100 years.

The Black Carapace.

While Unarmored, the Astartes AC is 18, regardless of DEX.

Multiattack.

The Adeptus Astartes makes 3 attacks.

Poison Spit.

The Astartes, if without a helmet, can spit a glob of poison up to 30 feet at an enemy. +9 to hit, One Target, Hit: 21 (6d4+6) Poison Damage.

Thunder Hammer.

Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 31 (6d6+10) thunder damage. If the target is size Large or smaller, it is flung back 10 feet.

Bolter.

Ranged Weapon Attack: +14 to hit, range 80/240 ft., one target. Hit: 28 (4d8+10) piercing damage. Deals an additional 1d8 Thunder Damage

Chainsword.

Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 22 (4d6+8) slashing damage.

Flamer.

Ranged Weapon Attack: +9 to hit, range 15/30 ft., 30 Foot Cone. Hit: 20 (6d4+5) fire damage. All objects in range of the cone are set on fire.

The adeptus astartes can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature's turn. The adeptus astartes regains spent legendary actions at the start of its turn.

Bolter.

The Astartes makes a Bolter attack.

Chainsword.

The Astartes makes a Chainsword attack.