Is PuPu UFO legal in Standard, Modern, and Commander?

PuPu UFO is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is PuPu UFO?

PuPu UFO is an Artifact Creature — Construct Alien. Its oracle text reads: "Flying {T}: You may put a land card from your hand onto the battlefield. {3}: Until end of turn, this creature's base power becomes equal to the number of Towns you control."