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

The average thri-kreen life expectancy is only thirty years. This may be because they do not sleep.

Thri-Kreen are usually neutral and often chaotic.

Thri-Kreen are usually taller and thinner than humans. Your size is Medium.

Your base walking speed is 40 feet.

You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

Thri-kreen can change the color of their carapace to match the color and texture of their surroundings as they become older. As a result, once you become level 4, you have advantage on Dexterity (Stealth) checks made to hide, and while you aren’t wearing armor, your Armor Class is 13 + your Dexterity modifier.

Your long jump is up to 30 feet and your high jump is up to 15 feet, with or without a running start.

You can speak, read, and write Common and Thri-Kreen. Thri-Kreen is a language without words. To show emotion and reaction, a thri-kreen clacks its mandibles and waves its antennae, giving other thri-kreen a sense of what it is thinking and feeling. Other creatures find this manner of communication difficult to interpret and impossible to duplicate.

You have the ability to inflict crippling venom on those you bite. When you hit a creature with an unarmed strike using your bite, the damage type is piercing rather than bludgeoning, and that creature must make a Constitution saving throw or be poisoned for 1 minute. The save DC is equal to 8 + your proficiency bonus + your Constitution modifier. If that creature fails the save by 5 or more, they are paralyzed while poisoned in this way. A creature poisoned in this way can repeat the save at the end of each of its turns, ending the effect on itself on a success. You can only bite in this way once per turn, and only a number of times equal to your proficiency bonus, and you regain the ability to do so when you finish a long rest.

Thri-Kreen have four arms. However, each arm is significantly weaker than other humanoids’ arms. You also have four arms, but you require two arms to hold an object that normally takes one arm to hold, or four arms for an object that normally takes two arms to hold, or one arm for an object that has the light property.

You don’t need to sleep and can’t be forced to sleep by any means. To gain the benefits of a long rest, you can spend all 8 hours doing light activity, such as keeping watch.