Is Heckling Fiends legal in Standard, Modern, and Commander?

Heckling Fiends is legal in: Modern, Legacy, Vintage, Commander.

Heckling Fiends

Q: What type of card is Heckling Fiends?

Heckling Fiends is a Creature — Devil. Its oracle text reads: "{2}{R}: Target creature attacks this turn if able. *Their language may be a cacophonous agglomeration of chittering snorts and mad barking, but the message they send is all too clear.* Power/Toughness: 2/2"