Is Sunblade Elf legal in Standard, Modern, and Commander?

Sunblade Elf is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

What type of card is Sunblade Elf?

Sunblade Elf is a Creature — Elf Warrior. Its oracle text reads: "This creature gets +1/+1 as long as you control a Plains. {4}{W}: Creatures you control get +1/+1 until end of turn. *"We patrol the steppes to keep enemies from the forest verge."* Power/Toughness: 1/1"