Is Magnetic Web legal in Standard, Modern, and Commander?

Magnetic Web is legal in: Legacy, Vintage, Commander.

Magnetic Web

Q: What type of card is Magnetic Web?

Magnetic Web is an Artifact. Its oracle text reads: "If a creature with a magnet counter on it attacks, all creatures with magnet counters on them attack if able. Whenever a creature with a magnet counter on it attacks, all creatures with magnet counters on them block that creature this turn if able. {1}, {T}: Put a magnet counter on target creature."