Is Lashweed Lurker legal in Standard, Modern, and Commander?

Lashweed Lurker is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Lashweed Lurker

Q: What type of card is Lashweed Lurker?

Lashweed Lurker is a Creature — Eldrazi Horror. Its oracle text reads: "Emerge {5}{G}{U} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.) When you cast this spell, you may put target nonland permanent on top of its owner's library."