Devil's Sight. Magical darkness doesn't impede the abishai's darkvision.
Magic Resistance. The abishai has advantage on saving throws against spells and other magical effects.
Creeping Darkness (Recharge). The abishai casts darkness at a point within 120 feet of it, requiring no spell components or concentration. Wisdom is its spellcasting ability for this spell. While the spell persists, the abishai can move the area of darkness up to 60 feet as a bonus action.
Multiattack. The abishai makes one Bite attack and two Scimitar attacks.
Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit:8 (1d10 + 3) piercing damage plus 9 (2d8) acid damage.
Scimitar. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit:6 (1d6 + 3) force damage.
Shadow Stealth. While in dim light or darkness, the abishai takes the Hide action.
Each abishai was once a mortal who somehow won Tiamat's favor before death and, as a reward, found its soul transformed into a draconic devil to serve at her pleasure in the Nine Hells. Each type of abishai is associated with one of Tiamat's five dragon heads: black, blue, green, red, and white.