Babble

The sight of potential host bodies so excites the fetal savant that it babbles and giggles madly and childishly, creating an insanity effect. All sane creatures that start their turns within 60 feet of the fetal savant must succeed on a DC 13 Charisma saving throw or be affected by confusion (as the spell) for 1d4 rounds. This is a psychic effect. Creatures that successfully save cannot be affected by the same fetal savant's babbling for 24 hours. This action cannot be taken when the fetal savant is using Soul Exchange.

Soul Exchange

As an action, the fetal savant can attempt to take control of a creature it can see within 90 feet, forcing an exchange of souls as a magic jar spell, using its own body as the container. The fetal savant can use this power at will, but it can exchange souls with only one other creature at a time. The victim resists the attack with a successful DC 13 Charisma saving throw. A creature that successfully saves is immune to the same fetal savant's soul exchange for 24 hours. If the saving throw fails, the fetal savant takes control of the target's body and ferociously attacks nearby opponents, eyes blazing with otherworldly light. As an action, the fetal savant can shift from its host body back to its own, if it is within range, returning the victim's soul to its own body. If the host body or fetal savant is brought to 0 hit points within 90 feet of each other, the two souls return to their original bodies and the creature at 0 hit points is dying; it must make death saving throws until it dies, stabilizes, or regains hit points, as usual. If the host body or fetal savant is slain while they are more than 90 feet apart, their souls cannot return to their bodies and they are both slain. While trapped in the fetal savant's withered body, the victim is effectively paralyzed and helpless.