Is Martyrdom legal in Standard, Modern, and Commander?

Martyrdom is legal in: Legacy, Vintage, Commander, Pauper.

Martyrdom

Q: What type of card is Martyrdom?

Martyrdom is an Instant. Its oracle text reads: "Until end of turn, target creature you control gains "{0}: The next 1 damage that would be dealt to target creature, planeswalker, or player this turn is dealt to this creature instead." Only you may activate this ability."

Instant

Until end of turn, target creature you control gains ": The next 1 damage that would be dealt to target creature, planeswalker, or player this turn is dealt to this creature instead." Only you may activate this ability.