Is Higure, the Still Wind legal in Standard, Modern, and Commander?

Higure, the Still Wind is legal in: Modern, Legacy, Vintage, Commander.

Higure, the Still Wind

Q: What type of card is Higure, the Still Wind?

Higure, the Still Wind is a Legendary Creature — Human Ninja. Its oracle text reads: "Ninjutsu {2}{U}{U} ({2}{U}{U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) Whenever Higure deals combat damage to a player, you may search your library for a Ninja card, reveal it, put it into your hand, then shuffle. {2}: Target Ninja creature can't be blocked this turn. Power/Toughness: 3/4"