Is Thallid legal in Standard, Modern, and Commander?

Thallid is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Thallid?

Thallid is a Creature — Fungus. Its oracle text reads: "At the beginning of your upkeep, put a spore counter on Thallid.Remove three spore counters from Thallid: Create a 1/1 green Saproling creature token."

Thallid

Creature — Fungus

At the beginning of your upkeep, put a spore counter on Thallid.<br>Remove three spore counters from Thallid: Create a 1/1 green Saproling creature token.

Set Fallen Empires

Rarity Common

Artist Edward P. Beard, Jr.