Is Hopeful Initiate legal in Standard, Modern, and Commander?

Hopeful Initiate is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Hopeful Initiate

Q: What type of card is Hopeful Initiate?

Hopeful Initiate is a Creature — Human Warlock. Its oracle text reads: "Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.) {2}{W}, Remove two +1/+1 counters from among creatures you control: Destroy target artifact or enchantment. Power/Toughness: 1/2"