Is Goblin King legal in Standard, Modern, and Commander?

Goblin King is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Goblin King?

Goblin King is a Creature — Goblin. Its oracle text reads: "Other Goblins get +1/+1 and have mountainwalk."

Creature — Goblin

Other Goblins get +1/+1 and have mountainwalk.

Set Limited Edition Alpha

Rarity Rare

Artist Jesper Myrfors

Creature Modern Commander Legacy