Is Viridian Lorebearers legal in Standard, Modern, and Commander?

Viridian Lorebearers is legal in: Modern, Legacy, Vintage, Commander.

Viridian Lorebearers

Q: What type of card is Viridian Lorebearers?

Viridian Lorebearers is a Creature — Elf Shaman. Its oracle text reads: "{3}{G}, {T}: Target creature gets +X/+X until end of turn, where X is the number of artifacts your opponents control. *A small band of elves pledged many years ago to avoid the Edges of Forgetting. They have remained hidden until now.* Power/Toughness: 3/3"