For decades, Goblins were shoved into whatever dark holes their masters had on hand. Additionally, the cool and damp of cave environments well suit their odd tastes. You can see in dim light within 80 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern colour in darkness, only shades of grey.

Goblins are not the stoutest of heart. When the fighting turns against them, they are proficient at making quick escapes. You may use your bonus action to perform the Disengage or Hide actions.

Often times, Goblins find themselves in sticky situations where they must use the closest object at hand to deliver a nasty blow. Young Goblins are taught to keep an eye out for these opportune items and use them to great effect. You have automatic proficiency with all improvised weapons. In addition, if your improvised weapon does not resemble a known simple weapon, you can deal 1d6 damage with it, instead of 1d4.

Goblins, whether by their own discretion or someone else's, have lived in squalor for centuries. All manner of odours, tastes, and other nasty contaminents have strengthened their immune systems. You gain advantage on Con saving throws against ingested, inhaled, injury, or contact poisons, as well as against racial abilities such as stench. Additionally, you can eat spoiled food without suffering consequences.

Goblins are relatively short-lived, with a usual lifespan of around 65 years, though few die from old age. They reach adulthood around age 15, but grow to their full size closer to age 10. 

Most Goblins, though having distanced themselves from their more squalid kin, are still self-serving. They tend toward neutral or evil alignments, though legend speaks of one or two good Goblins. Goblins have little respect for order or codes, though some can learn to conform to the rules of society to their own advantage. Chaotic and neutral Goblins are far more common than lawful ones.

Standing at around an average of 4 feet, goblins can range from 3.5-4.5 feet. Your size is Small.

Your base walking speed is 25 feet.

You are fluent in Common and Goblin languages.

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