McDungus Amongus

When McDungus enters the battlefield, create a legendary green Fungus creature token named
Fungus Humongous with "This creature's power
and toughness are each equal to the number of Saproling and Fungus creatures you control."
If one or more spore counters would be placed on
a permanent you control, that many plus one
spore counters are placed on that permanent
instead.