Is Questing Phelddagrif legal in Standard, Modern, and Commander?

Questing Phelddagrif is legal in: Legacy, Vintage, Commander.

What type of card is Questing Phelddagrif?

Questing Phelddagrif is a Creature — Phelddagrif. Its oracle text reads: "{G}: This creature gets +1/+1 until end of turn. Target opponent creates a 1/1 green Hippo creature token. {W}: This creature gains protection from black and from red until end of turn. Target opponent gains 2 life. {U}: This creature gains flying until end of turn. Target opponent may draw a card."