Beta Gemmule

Creche Spawn. The gemmule is a damaged or deviant tadpole that reached a different kind of maturity. Under the auspices of a Mind Flayer Creche Keeper, they're turned into a kind of guard-monster that can be called upon to protect the Creche. Their connection to their Creche Keeper is so strong, that if it moves more than 100 ft. away from it, it starts to wilt and die.

Magic Resistance. The gemmule has advantage on saving throws against spells and other magical effects.

Psychic Slam. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 16 (3d10) psychic damage.

Leech. The gemmule targets one creature within 5 feet of itself and forces the target to make a DC 14 Dexterity saving throw. On a failed save, the gemmule enters the target’s space and attaches to the target. While the gemmule is attached, the target takes 7 (3d4) piercing damage at the start of each of its turns, and the gemmule can’t use Leech again until it detaches. It can detach itself by spending 5 feet of its movement. As an action, the target or a creature within 5 feet of the target can detach the gemmule by succeeding on a DC 15 Strength check.

Cerefluid Spray (Recharge 5–6). After taking damage from a melee attack, the beta gemmule spits partially digested cerefluid in a 30 ft. cone at its attacker. Any creature who comes into contact with the fluid must succeed on a DC 14 DEX saving throw or be blinded until the end of the beta gemmule's next turn.