Is Chambered Nautilus legal in Standard, Modern, and Commander?

Chambered Nautilus is legal in: Legacy, Vintage, Commander.

Chambered Nautilus

Q: What type of card is Chambered Nautilus?

Chambered Nautilus is a Creature — Nautilus Beast. Its oracle text reads: "Whenever this creature becomes blocked, you may draw a card. *What's merely a home for the nautilus can become exquisite jewelry in the hands of Saprazzan artisans.* Power/Toughness: 2/2"