Symbiosis
5
When a non-fungus creature you control dies, summon 2 spores.
When a fungus you control enters play, if you control 3+ non-fungi creatures, it gains adrenaline.
Symbiosis (upped)
4
When a non-fungus creature you control dies, summon 2 toxic spores.
When a fungus you control enters play, if you control 3+ non-fungi creatures, it gains adrenaline.
("Fungi" are so far only Fungus, Toxic Fungus, and their respective spores.)
(Symbiosis is a mutually beneficial relationship between a host and a hosted organisms. Many mushrooms are symbiotic.)