Once per day, as an action, you can release a 20-foot-radius cloud of demon-tainted spores.
Any other creature within the area that isn't already "blessed" with Zuggtmoy's gift must make a Constitution saving throw with a save DC of 8 + the myconid's Constitution modifier + the myconid's proficiency bonus. 

A creature that forgoes or fails the saving throw becomes infected.
While infected with Zuggtmoy's gift, the creature gains the ability to cast a special verison of the tree stride spell that has no components, once per long rest.

Any creature infected with Zuggtmoy's gift has disadvantage on attack rolls against plant creatures. 
After each short or long rest, an infected creature makes a DC 15 Wisdom saving throw.
On a failed save, the creature lapses into a state of euphoric bliss. While in this state, the creature can't take actions, bonus actions or reactions and must use all of its movement to dance and twirl about.
On the end of its turn, the creature can repeat the saving throw, ending the euphoric bliss effect on a success.