As you are two beings, you get two turns.

When you roll a 1 on the d20 for an attack roll, ability check, or saving throw, you can reroll the die and must use the new roll.

You can move through the space of any creature that is of a size larger than yours.

You have advantage on saving throws against being frightened.

Split into 2  individual Halflings. Each will have half of your stats, with 2 added to the agility and attack scores. Each gets its own score.

As you consist of two Halflings, your height should be the sum of all three. Usually between 5 and 6 feet tall.

Your base walking speed is 30 feet.

You can speak, read, and write Common, Halfling, and one extra language of your choice. They typically learn the languages of other peoples they deal with, including obscure dialects. They are fond of sprinkling their speech with words borrowed from other tongues: Goblin war chants, Elvish poems, Triton sea shanties, and so on.

Your ability scores each increase by 2.