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

Pack tactics. If the goblin is has an ally within 5ft of its target it has advantage on its attack rolls

Minion. This creature is a minion, It retains all of its features and abilities but only has 1 hit point

Acid Spear. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) slashing damage and 3 (1d6) acid damage

Acid Bomb. Ranged Weapon Attack: +6 to hit, range 30/120 ft., 5ft radius. Hit: 8 (2d6 + 4) acid damage

Self Destruct. When the goblin falls to 0 hit points it can use its reaction to detonate and acid bomb centered on itself. Creatures withing 10 ft. must make a DC 11 Dex save or take 6 (2d6) acid damage on a failed save or half as much on a success.