Is Kargan Intimidator legal in Standard, Modern, and Commander?

Kargan Intimidator is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Kargan Intimidator

Q: What type of card is Kargan Intimidator?

Kargan Intimidator is a Creature — Human Warrior. Its oracle text reads: "Cowards can't block Warriors. {1}: Choose one that hasn't been chosen this turn — • This creature gets +1/+1 until end of turn. • Target creature becomes a Coward until end of turn. • Target Warrior gains trample until end of turn. Power/Toughness: 3/1"