You need to rephrase Mind Latch

Recommended Revision:

As an action, the mind latcher can target a creature within 5 feet.  The target must make a DC13 Constitution saving throw or be poisoned. While the target is poisoned in this way, the mind latcher has advantage on attack rolls against the targeted creature. The creature can repeat the saving throw at the start of its next turn, ending the effect on a success.

Quote from Smokehorn_knight_of_Cats >>

You need to rephrase Mind Latch

Recommended Revision:

As an action, the mind latcher can target a creature within 5 feet.  The target must make a DC13 Constitution saving throw or be grappled. While the target is grappled, it suffers from the following effects:

• The target is poisoned.
• The mind latcher has advantage on attack rolls against the targeted creature

The creature can repeat the saving throw at the start of its next turn, ending the effect on a success.

has disadvantage on Wisdom saving throws until the mind latcher takes damage or the creature uses its action to scrape the mind latcher off. 

 but being grappled means the target can not move.The point of the ability is just to hitch hike on a target for easy feasting not to stop them in their tracks.though will through a save on.

I would also recommend revising the tentacles attack for clarity.

For the tentacles, I think you should lower the dc to 10 and having the "failing by more than 5" effects included in it.

Revisions recommended for "failing by more than 5" effects:

The target takes 14 (4d6) psychic damage and the mind latcher has advantage on wisdom, charisma, and intelligence checks and saving throws for 1 minute.

Quote from stuffattackknightofrandom >>

Quote from Smokehorn_knight_of_Cats >>

You need to rephrase Mind Latch

Recommended Revision:

As an action, the mind latcher can target a creature within 5 feet.  The target must make a DC13 Constitution saving throw or be grappled. While the target is grappled, it suffers from the following effects:

• The target is poisoned.
• The mind latcher has advantage on attack rolls against the targeted creature

The creature can repeat the saving throw at the start of its next turn, ending the effect on a success.

has disadvantage on Wisdom saving throws until the mind latcher takes damage or the creature uses its action to scrape the mind latcher off. 

 but being grappled means the target can not move.The point of the ability is just to hitch hike on a target for easy feasting not to stop them in their tracks.though will through a save on.

 I'll change it to Poisoned

Quote from Smokehorn_knight_of_Cats >>

Quote from stuffattackknightofrandom >>

Quote from Smokehorn_knight_of_Cats >>

You need to rephrase Mind Latch

Recommended Revision:

As an action, the mind latcher can target a creature within 5 feet.  The target must make a DC13 Constitution saving throw or be grappled. While the target is grappled, it suffers from the following effects:

• The target is poisoned.
• The mind latcher has advantage on attack rolls against the targeted creature

The creature can repeat the saving throw at the start of its next turn, ending the effect on a success.

has disadvantage on Wisdom saving throws until the mind latcher takes damage or the creature uses its action to scrape the mind latcher off. 

 but being grappled means the target can not move.The point of the ability is just to hitch hike on a target for easy feasting not to stop them in their tracks.though will through a save on.

 I'll change it to incapacittated

 I feel like you did  not read my post.The point of ability is for feeding not disabling.

Quote from stuffattackknightofrandom >>

Quote from Smokehorn_knight_of_Cats >>

Quote from stuffattackknightofrandom >>

Quote from Smokehorn_knight_of_Cats >>

You need to rephrase Mind Latch

Recommended Revision:

As an action, the mind latcher can target a creature within 5 feet.  The target must make a DC13 Constitution saving throw or be grappled. While the target is grappled, it suffers from the following effects:

• The target is poisoned.
• The mind latcher has advantage on attack rolls against the targeted creature

The creature can repeat the saving throw at the start of its next turn, ending the effect on a success.

has disadvantage on Wisdom saving throws until the mind latcher takes damage or the creature uses its action to scrape the mind latcher off. 

 but being grappled means the target can not move.The point of the ability is just to hitch hike on a target for easy feasting not to stop them in their tracks.though will through a save on.

 I'll change it to incapacittated

 I feel like you did  not read my post.The point of ability is for feeding not disabling.

 I edited the bolded post. 

well done this is amzing