MONSTROSITY
A thri-kreen resembled a giant praying mantis, bipedal and standing 4.5–7 feet (1.4–2.1 meters) high and weighing 100–375 pounds (45–170 kilograms a full-grown adult averaged at 6 feet (1.8 meters) and 200 pounds (90 kilograms). They had exoskeletons over their entire bodies. They had six limbs protruding from their thorax: two for walking and four for use as arms, ending in four-fingered claw-like hands capable of tool- and weapon-use. Their insectoid heads had two black, multi-faceted compound eyes; two small antennae sprouting from the top; and a complex jaw structure with large sharp mandibles. It was extremely difficult to distinguish the males and females.
The carapace of a thri-kreen was typically a sandy yellow in hue, but could vary from a sandy brown to a pale green color, as best suited the environment. This enabled thri-kreen to blend in with the dry savannas and grasslands they dwelled in.
Thri-kreen wore little to no clothing or armor. Instead, they wore only simple leather belts, harnesses, or slings to hold their food, equipment, and weaponry, and only as much as they needed. They did not make or wear any kind of adornments.
Thri-Kreen Traits
Size: Medium (about 5–7 feet tall) or Small (about 2–4 feet tall)
Speed: 30 feet
As a Thri-Kreen, you have these special traits.
Chameleon Carapace. While you aren’t wearing armor, your carapace gives you a base Armor Class of 13 + your Dexterity modifier.
As an action, you can change the color of your carapace to match the color and texture of your surroundings, giving you advantage on Dexterity (Stealth) checks made to hide in those surroundings.
Darkvision. You can see in dim light within 60 feet of yourself as if it were bright light, and in darkness as if it were dim light. You discern colors in that darkness only as shades of gray.
Secondary Arms. You have two slightly smaller secondary arms below your primary pair of arms. The secondary arms can manipulate an object, open or close a door or container, pick up or set down a Tiny object, or wield a weapon that has the light property.
Sleepless. You do not require sleep and can remain conscious during a long rest, though you must still refrain from strenuous activity to gain the benefit of the rest.
Thri-kreen Telepathy. Without the assistance of magic, you can’t speak the non-thri-kreen languages you know. Instead you use telepathy to convey your thoughts. You have the magical ability to transmit your thoughts mentally to willing creatures within 120 feet of yourself. A contacted creature doesn’t need to share a language with you to understand your thoughts, but it must be able to understand at least one language. Your telepathic link to a creature is broken if you and the creature move more than 120 feet apart, if either of you is incapacitated, or if either of you mentally breaks the contact (no action required).