Is Abominable Treefolk legal in Standard, Modern, and Commander?

Abominable Treefolk is legal in: Modern, Legacy, Vintage, Commander.

Abominable Treefolk

Q: What type of card is Abominable Treefolk?

Abominable Treefolk is a Snow Creature — Treefolk. Its oracle text reads: "Trample Abominable Treefolk's power and toughness are each equal to the number of snow permanents you control. When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."