­Fungal Bloom

Spore counters. Need to decide what to doooo with those. Really do.

This is the "Make it linear" rare; but... the whole thing already was pretty linear. Meh. You know what; let's let anything bloom.

Much more exciting!

"Just wait 'til I get this down along with three copies from among any of Pentad Prism, Gemstone Array, Druids' Repository, or Morselhoarder that still have charges left, or a non-summoning-sick Devoted Druid that's been charged with a +1/+1 counter somehow..."

(Hey, the existing Viral Drake can also work with a couple other options like Workhorse, but then you need five copies!)

Yeah, it is potentially infinite; might need a slight upcost.

It really doesn't. I've got a deck that does the Viral Drake trick with Gemstone Array, Pentad Prism, Morselhoarder, and lands like Calciform Pools. It's not that bad.

Once again, I think you should keep the traditional Fungus ability - it's got a long pedigree now. If you really want to boost it then make all Thallids either Sporesower Thallids or Sporoloth Ancients.

Oh yeah; in-set this is definitely intended to continue working as it always did; to boost all your existing thallids.

There's few other counters in the set (storage lands, though, which is a nice green combo)

It just makes it a lot more exciting - boost ALL your thallids; while also allowing it to exist beyond the set.

I was thinking maybe to cast, still to activate. Not much of an increase; and I reckon I'd still want to run it.

could make it : Put a spore counter on each fungus you control.

Could do; and that would make it work slightly more naturally (since you don't need to worry about removing the last counter from something). But I also rather like the idea of this co-operating with tide counters.