Is Warhost's Frenzy legal in Standard, Modern, and Commander?

Warhost's Frenzy is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Warhost's Frenzy

Q: What type of card is Warhost's Frenzy?

Warhost's Frenzy is an Instant. Its oracle text reads: "Kicker {B} (You may pay an additional {B} as you cast this spell.) Creatures you control get +2/+0 until end of turn. If this spell was kicked, whenever a creature you control dies this turn, draw a card."