Cerebral Ant

(Homebrew creature design for the tabletop role playing game Dungeons and Dragons)
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"An insect, the size of a big rat, appears from a cavity next to you. The creature looks like an ant without antennae, but its upper body seems covered with thick brain tissue. Its faceted eyes are staring at you, and its razor-sharp mandibles open to drool a thick, green saliva. As it approaches you, the surrounding place starts to vibrate with psionic energy."
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The cerebral ant is an insect with innate psionic abilities. It is a beloved pet among psions, not only for its mental faculties, but also for its natural loyalty. In the wild, it is common for cerebral ants to team up with other psionic creatures, so the two species can provide mutual protection. Unlike ordinary ants or formians, cerebral ants do not live in colonies, and have neither queen nor various castes. They form pairs to reproduce during the mating season, and gather in nests of several dozen individuals to protect their eggs and larvae until they reach adulthood. A cerebral ant is around 9 inches long, and weights around a pound. What one might take for brain tissue is in fact a rigid shell that adopts the patterns of the creature's brain, which fills half of its body. Cerebral ants are unable to speak but they can communicate telepathically with any speaking creature, within a range of several meters around them. However, they can only understand and send simple messages, such as "who are you?", "let us move to this place" or "do not touch it".
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COMBAT : A cerebral ant never starts hostilities without being provoked. If it detects hostile behavior, it will send out a telepathic message to its opponents, for example “stay away” or “what do you want?”. If it or its companions are attacked, a cerebral ant implements elaborate strategies to use its own abilities in the best ways, as well as those of its group. For example, if it's in the company of a creature physically stronger than it, the cerebral ant will ask him to fight melee while supporting him by launching mental attacks. Cerebral ants never flee from confrontation if their associates or their brood are in danger. 
Venom: Any individual bitten by a cerebral ant must succeed on a Fortitude save to avoid being inoculated with its venom. Initial and side effect: temporary loss of Intelligence.
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