Is March of Otherworldly Light legal in Standard, Modern, and Commander?

March of Otherworldly Light is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

March of Otherworldly Light

Q: What type of card is March of Otherworldly Light?

March of Otherworldly Light is an Instant. Its oracle text reads: "As an additional cost to cast this spell, you may exile any number of white cards from your hand. This spell costs {2} less to cast for each card exiled this way. Exile target artifact, creature, or enchantment with mana value X or less."

Instant

As an additional cost to cast this spell, you may exile any number of white cards from your hand. This spell costs less to cast for each card exiled this way.