Goblins see in the dark

Your Dexterity score increases by 2, and your Constitution score increases by 1.

As a bonus action the goblins can mantle on one another's shoulders and make a deception or performance check to pretend to be one normal sized person. The two goblins share a health pool when together and evenly split it when they split.

While STACKED the goblins gain

Extra Hands

Hidden Eyes

The Cost of Shenanigans

While SPLIT the goblins gain

Fury of the Small

Nimble Escape

Scatter!

SPLIT ONLY: When you damage a creature with an attack or a spell and the creature's size is larger than yours, you can cause the attack or spell to deal extra damage to the creature. The extra damage equals your level. Once you use this trait, you can't use it again until you finish a short or long rest.

SPLIT ONLY: You can take the Disengage or Hide action as a bonus action on each of your turns.

SPLIT ONLY: Add 1 to your AC when separate. Two goblins running around are harder to hit

STACKED ONLY: While they are stacked they have advantage on Slight of Hand, and Deception. They can also hold up to 4 weapons

STACKED ONLY: While on each others shoulders the twins have disadvantage on Dexterity and Charisma saving throws, and Acrobatics checks

STACKED ONLY: Advantage on perception Checks and you cannot be suprised.