Is Dauntless Dourbark legal in Standard, Modern, and Commander?

Dauntless Dourbark is legal in: Modern, Legacy, Vintage, Commander.

Dauntless Dourbark

Q: What type of card is Dauntless Dourbark?

Dauntless Dourbark is a Creature — Treefolk Warrior. Its oracle text reads: "Dauntless Dourbark's power and toughness are each equal to the number of Forests you control plus the number of Treefolk you control. This creature has trample as long as you control another Treefolk. Power/Toughness: */*"