Halfling

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Lucky: 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.
  Brave: You have advantage on saving throws against being frightened.
  Halfling Nimbleness:You can move through the space of any creature that is of a size larger than yours.
  Subrace: there are 4 subraces of halfling, Stout, Lightfoot, Ruva, and Goblin
 

Lightfoot

Ability Score Increase:Your Charisma score increases by 1.
Naturally Stealthy:You can attempt to hide even when you are obscured only by a creature that is at least one size larger than you.
 

Stout:

Ability Score Increase:Your Constitution score increases by 1.
  Stout Resilience:You have advantage on saving throws against poison, and you have resistance against poison damage.
 

Ruva

Ability Score Increase Your Wisdom score increases by 1.
Silent Speech You can speak telepathically to any creature within 30 feet of you. The creature understands you only if the two of you share a language. You can speak telepathically in this way to one creature at a time.
 

Goblin

Ability Score Increase: Your Strength score increases by 1.
Fury of the Small: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