Is Rubblehulk legal in Standard, Modern, and Commander?

Rubblehulk is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

What type of card is Rubblehulk?

Rubblehulk is a Creature — Elemental. Its oracle text reads: "Rubblehulk's power and toughness are each equal to the number of lands you control. Bloodrush — {1}{R}{G}, Discard this card: Target attacking creature gets +X/+X until end of turn, where X is the number of lands you control. Power/Toughness: */*"