Is Professor Hojo legal in Standard, Modern, and Commander?

Professor Hojo is legal in: Legacy, Vintage, Commander.

What type of card is Professor Hojo?

Professor Hojo is a Legendary Creature — Human Scientist. Its oracle text reads: "The first activated ability you activate during your turn that targets a creature you control costs {2} less to activate. Whenever one or more creatures you control become the target of an activated ability, draw a card. This ability triggers only once each turn. Power/Toughness: 2/2"