At the beginning of your upkeep, put a spore counter on each Fungus you control.
Remove three spore counters from Sporesower Thallid: Create a 1/1 green Saproling creature token.
Sporesower Thallid's triggered ability will put a spore counter on each Fungus creature you control, even if that Fungus doesn't have any abilities that makes use of them.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.