Vigorous Nature Constitution is your Saving Throw, and also your spellcasting ability for your druid spells.
Myconic Fortitude Your Revived creatures add your Constitution to their one.
Fungal Excretion Your Halo of Spores is attached to your Revived creatures and you can always use its reaction.
Epidemy of Mushrooms 1d4 chance to spawn a mushroom with your Halo of Spores attached to it, for 3 turns.
Mycelial Network Fungal infestation happens within 60m and revives any creature.
Mysterious Mycelium Halo of Spores has a 1d20 chance to grant a random spore effect that lasts until long rest.
Explainer
Fantasy: The Last of Us, Star Trek Discovery
Gameplay: Group enemies. Spreading Spores. Epidemy of Mushrooms. Mycelial Network. Fungal Excretion. Loop.
Vigorous Nature: Max Constitution for Myconic Fortitude.
Myconic Fortitude: Greatly improves the Undead Fortitude of Revived creatures. They are now nearly immortal.
Fungal Excretion: Revived creatures as extensions of your Halo of Spores. The double dice of Symbiotic Entity applies. Spreading Spores is compatible with Halo of Spores.
Epidemy of Mushrooms: Temporary extensions of your Halo of Spores. The double dice of Symbiotic Entity applies.