Is Arboretum Elemental legal in Standard, Modern, and Commander?

Arboretum Elemental is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Arboretum Elemental?

Arboretum Elemental is a Creature — Elemental. Its oracle text reads: "Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Hexproof (This creature can't be the target of spells or abilities your opponents control.) Power/Toughness: 7/5"