Source: Unearthed Arcana 53 - Races of Ravnica

Many reptiles derive their body warmth and energy from the sun, but the humanoid viashino are fueled by an inner fire of zeal. Open with their emotions, viashino can be hot-tempered, but they are also quick to their hissing laughter, and they easily form close bonds of friendship. They are fierce warriors and passionate advocates for their guilds and causes.

• Ability Score Increase. Your Dexterity score increases by 2, and your Strength score increases by 1.

• Age. Viashino mature quickly, reaching adulthood in their early teens. They live violent lives and rarely die of old age, but they would rarely live past 60 anyway.

• Alignment. Viashino strongly tend toward chaotic alignments. They have no particular inclination toward good or evil.

• Size. Viashino are about as tall as humans, but they have lithe, wiry frames. Your size is Medium.

• Speed. Your base walking speed is 30 feet.

• Bite. Your fanged maw is a natural weapon, which you can use to make unarmed strikes. If you hit with it, you deal piercing damage equal to 1d4+ your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike.

• Lashing Tail. Your semi-prehensile tail is tipped with a bony blade. Immediately after a creature within 5 feet of you deals damage to you with a melee attack, you can use your reaction to make an unarmed strike against that creature with your tail. If you hit, you deal slashing damage equal to 1d4 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike.

• Wiry Frame. You gain proficiency in the Acrobatics or the Stealth skill (your choice).

• Languages. You can speak, read, and write Common and Draconic.