Is Krovikan Horror legal in Standard, Modern, and Commander?

Krovikan Horror is legal in: Legacy, Vintage, Commander.

Krovikan Horror

Q: What type of card is Krovikan Horror?

Krovikan Horror is a Creature — Horror Spirit. Its oracle text reads: "At the beginning of the end step, if Krovikan Horror is in your graveyard with a creature card directly above it, you may return Krovikan Horror to your hand.{1}, Sacrifice a creature: Krovikan Horror deals 1 damage to any target."

Creature — Horror Spirit

At the beginning of the end step, if Krovikan Horror is in your graveyard with a creature card directly above it, you may return Krovikan Horror to your hand.<br>, Sacrifice a creature: Krovikan Horror deals 1 damage to any target.