Is Boros Fury-Shield legal in Standard, Modern, and Commander?

Boros Fury-Shield is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Boros Fury-Shield?

Boros Fury-Shield is an Instant. Its oracle text reads: "Prevent all combat damage that would be dealt by target attacking or blocking creature this turn. If {R} was spent to cast this spell, Boros Fury-Shield deals damage to that creature's controller equal to the creature's power."

Boros Fury-Shield

Instant

Prevent all combat damage that would be dealt by target attacking or blocking creature this turn. If was spent to cast this spell, Boros Fury-Shield deals damage to that creature's controller equal to the creature's power.