Dwarven Resilience. The warrior has advantage on Saving Throws against poison, and has Resistance against poison damage.

Great Weapon Fighting. When the warrior rolls a 1 or 2 on a damage die for its Maul attack, it can re-roll the die as it wishes, unlimited times. 

Asguardian Shield. On all saving throws, if you roll a 1,2, or 3, you may re-roll. Further, this unit is immune to pierce.

Improved Critical. The warrior's weapon attacks score a critical hit on a roll of 19 or 20.

Multiattack. The warrior makes two Maul attacks, or two melee handaxe attacks.

Maul. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 8 (2d6 + 2) bludgeoning damage.

Crossbow, Heavy. Ranged Weapon Attack: +3 to hit, range 100/400 ft., one target. Hit: 7 (1d10 + 1) piercing damage.

Handaxe. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 2) slashing damage.

Handaxe. Ranged Weapon Attack: +4 to hit, range 20/60 ft., one target. Hit: 6 (1d6 + 2) slashing damage.

Action Surge (1/Short or Long Rest). On the warrior's turn, it can take one additional action on top of its regular action and a possible bonus action.

Second Wind (1/Short or Long Rest). As a bonus action, the warrior regains 1d10 + 5 hit points. 

Sentry Affinity. When an enemy attacks something other than this kind of monster, this unit can intercept and become the target with a +3d6 saving roll. If this is used, the unit has spent his next action.

Asguardian Aura (Costs 3 Actions). All allies gain +5 AC for the remainder of the round, and this unit's next saving roll is maximized.