Essence of Aboleth

You harness the essence of an Aboleth's primeval magic energy. When you activate this ability, your skin becomes translucent, several mouths open from your face and neck, your limbs get longer and more flexible, and your skin excretes a mucus membrane. For the duration of the spell, you can breathe underwater normally and gain a swim speed equal to your walk speed. There are two additional effects that you can perform with this spell:

ENSLAVE: You may targets one creature you can see within 30 feet of you. The target must succeed on a Wisdom saving throw or be magically charmed by you until you die or until you are on a different plane of existence from the target. The charmed target is under your control and can't take reactions, and you and the target can communicate telepathically with each other over any distance. Whenever the charmed target takes damage, the target can repeat the saving throw. On a success, the effect ends. No more than once every 24 hours, the target can also repeat the saving throw when it is at least 1 mile away from you. Using this ability immediately ends the spell. You can only have one slave at a time. If you attempt to enslave another creature, you lose control over the first.

MUCUS CLOUD: While underwater, you are surrounded by transformative mucus. A creature that touches you or that hits you with a melee attack while within 5 feet of it must make a Constitution saving throw. On a failure, the creature is diseased for 1d4 hours. The diseased creature can breathe only underwater. If you are above water, you can still transform them, but they have advantage on the save and every minute they are outside of water, they can repeat the save to end the effect.