Fungal Caverns

When you planeswalk to Fungal Caverns, or at
the beginning of your upkeep, put a spore counter on Fungal Caverns. Then, if Fungal Caverns has three or more spore counters on it, remove all spore counters and each player puts a 1/1 green Saproling creature token onto the battlefield.
{c}: Each player puts a 1/1 green Saproling creature token onto the battlefield.