Is Experiment Twelve legal in Standard, Modern, and Commander?

Experiment Twelve is legal in: Legacy, Vintage, Commander.

Experiment Twelve

Q: What type of card is Experiment Twelve?

Experiment Twelve is a Creature — Elf Lizard Warrior. Its oracle text reads: "Trample Whenever this creature or another creature you control is turned face up, put +1/+1 counters on that creature equal to its power. Disguise {4}{G} (You may cast this card face down for {3} as a 2/2 creature with ward {2}. Turn it face up any time for its disguise cost.)"