Arbî Raider

Dark One's Gift. The Arbî has resistance to Cold and Fire damage, and is immune to being Charmed, Frightened, or Poisoned as a result of their metamorphosis from human to Arbî.

Shadowskin. The Arbî's skin appears to move and change like shifting shadows. This helps the Arbî blend into its surroundings during the night. The Arbî receives advantage on all Dexterity (Stealth) checks during nighttime. 

Multiattack. The Arbî makes two melee attacks: either with its spear or handaxe. Alternatively, the Arbî may make two ranged attacks with its shortbow.

Spear. Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 7 (1d8 + 3) piercing damage.

Handaxe. Melee Weapon Attack: +5 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 6 (1d6 + 3) slashing damage.

Shortbow. Ranged Weapon Attack: +4 to hit, ranged 80/320 ft., one target. Hit: 6 (1d6 + 2) piercing damage.

Flaming Arrows. As a bonus action, the Arbî can ignite the first arrow that it shoots during its first attack each round. The arrow deals an additional 1d4 + 2 fire damage and ignites flammable objects if they are not worn or carried. 

Poisoned Blades. As a bonus action, the Arbî can anoint their arrow, handaxe, or spear with a virulent poison. The poison lasts for one attack and causes the hit target to make a DC 15 Constitution saving throw. If they fail the throw, they become poisoned. During each turn after being poisoned, the target may make a Constitution saving throw to end the effect. 

Rage. As a bonus action, the Arbî can enter a furious rage. This causes the Arbî to gain resistance against bludgeoning, piercing, and slashing damage, but cannot use the Flaming Arrows or Poisoned Blades bonus actions, nor can the Arbî obey specific strategic commands, unless issued by an Agent of its Dark Lord. 

Frenzy. Upon taking damage for the first time, the Arbî is emboldened by a frenzied wrath. The Arbî gains 6 (1d8+2) temporary hit points and has advantage on its next saving throw.