Circle of the Fungus

Symbiotic Spores

When you choose this circle at 2nd level, you have the ability to infuse an ally within 5 feet of you with spores, as an action. You can have a number of spores active at a time equal to your Wisdom modifier (minimum of 1). Through these spores you can communicate telepathically at any given time with anyone that is infected. You have to be within 60 feet from a target in order to exchange thoughts. You don't need to know their exact location, as long as they are within 60 feet of you. Also, the infected targets can communicate between themselves but every infected creature (and you) can hear the exchange. As an action, you can remove a spore and add it back to your body.

Fungus Skin

Also at 2nd level, when you use your Wildshape, you can choose to cover yourself with a number of fungi equal to your Wisdom modifier (minimum of 1). The appearance of the creature shifts accordingly and you gain Resistance to poison damage. Also, whenever someone lands a hit on you, one of your fungi explodes dealing 1d6 damage to everyone around you within a radius of 5 feet.   When all of your fungi explode, you lose the effects of the Fungus Skin.  

Assume Control

At 6th level, while in humanoid form, you can use your Symbiotic Spores on your enemies. Make a ranged spell attack. On a hit, the spores connect with the creature and can only be removed if the creature takes a full action to make a Strength (Athletics) check (DC equals your spell save DC). You can use your bonus action each turn to cast the spell Command to any enemy creature that is infected by your Symbiotic Spores. Each time you issue a command, the creatures must make a Wisdom saving throw against your spell save DC. On a success, they are not affected by Command this turn.

Rotten Grasp

At 10th level, you have always prepared the spell Grasping Vine and it does not count against your prepared spells. You can cast the spell for free if the point of origin of the spell is from a dead creature.

Lord of the Flies

At level 14, you always have the benefits of Fungus Skin, even in your humanoid form. In addition, the number of fungi that cover your body are unlimited and the damage increases to 2d6 + your Wisdom modifier.   Also, when you use Assume Control, instead of Command, you cast Suggestion.   Finally, your Rotten Grasp deals damage equal to 2d6 + your Wisdom modifier.