Is Bark of Doran legal in Standard, Modern, and Commander?

Bark of Doran is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Bark of Doran

Q: What type of card is Bark of Doran?

Bark of Doran is an Artifact — Equipment. Its oracle text reads: "Equipped creature gets +0/+1. As long as equipped creature's toughness is greater than its power, it assigns combat damage equal to its toughness rather than its power. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)"