Weeping Vortex

Indescribable Appearance. Any creature that starts its turn within 30 feet of the Weeping Vortex must make a DC 16 Constitution or Madness saving throw. On a failed save, the creature is charmed and becomes incapacitated for one minute. The creature can repeat the saving throw at the start of its next turn, with disadvantage if the Weeping Vortex is within line of sight, ending the effect on itself on a success.

If the creatures's saving throw is a success of +5 or greater the effect ends and the creature is immune for the next 24 hours. On any other success the creature is no longer charmed for that turn. 

Unless the target is surprised, the target can avert its eyes and avoid making the initial saving throw. Until the start of its next turn the creature that averts its eyes has disadvantage on any attack rolls or spells requiring line of sight on the creature.

If the spell requires line of sight, then the creature cannot make the spell.

Soul Drain. When the Weeping Souls starts its turn, each creature that has zero hit points and is still alive within 15 feet must succeed a DC 15 wisdom saving throw or die, its soul being devoured. The creature regains a number of hit points equal to five times the level of any creature killed this way. On a successful saving throw the creature is immune to the soul drain for the next 24 hours. 

Multi-Attack. The Weeping Vortex makes four melee attacks with its pseudopods and two with its corrosive tendrils. 

Weakening Pseudopod. Melee Weapon Attack: +3 to hit, reach 15 ft., 1 target. Hit: 7 (2d6 + 4) [acid] damage.

The Weeping Vortex lashes out a pseudopod toward a creature within 15 feet. The creature must success a DC 16 Dexterity saving throw or be restrained. While restrained, the creatures suffers disadvantage on strength ability checks and saving throws and the Weeping Vortex cannot use this ability on another target. The creature restrained by the pseudopod can make a DC 16 strength saving throw at the end of each of its turns to end the grapple, taking 2d6 acid damage on a failed save. If the creature's hit points are reduced to zero while grappled it is disintegrated as per the disintegration spell. 

Corrosive Tendrils. Melee Weapon Attack: +7 to hit, reach 10 ft., 1 target. Hit: 18 (4d8) [acid] damage. 

Non-magical armor worn by the target is partly dissolved and takes permanent and cumulative -1 to the AC is offers. The armor is destroyed if the penalty reduces the AC bonus to 0. The penalty also applies to shields.