Rough Skin. Aalantir have a naturally Rough hide, Melee attacks that are non magical do 1d4 less damage.

Warrior Caste. The warriors of the Aalantir are trained since birth to combat outside threats and become aggressive against intruders, whilst fighting underground they gain 1d4 bonus damage on melee attacks.

Great Club. Melee Weapon Attack: +5 to hit, reach 5 ft, one target. Hit: 9 (1d8 + 4) Bludgeoning damage. 

Javelin. RangedWeapon Attack: +3 to hit, range 30/120 ft, one target. Hit: 6 (1d6 + 3) Piercing damage.

Underground Stab. When fighting underground against the Aalantir warrior they can as a Reaction make an Javelin melee attack, Melee Weapon Attack: +4 to hit, reach 5 ft, one target Hit 7 (1d6 + 4) when they are attacked in melee.