Nimble Escape. The goblin can take the Disengage or Hide action as a bonus action on each of its turns.

Explosive Finish. When a void goblin dies, they explode in a violent biochemical reaction, showering all nearby creatures in a spray of acid. All creatures within 10ft must make a DC 13 Dexterity saving throw or take 1d6 acid damage, or half as much on a successful save. 

Scimitar. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) slashing damage.

Shortbow. Ranged Weapon Attack: +5 to hit, range 80/320 ft., one target. Hit: 6 (1d6 + 3) piercing damage.