Is Boneshard Slasher legal in Standard, Modern, and Commander?

Boneshard Slasher is legal in: Legacy, Vintage, Commander.

Boneshard Slasher

Q: What type of card is Boneshard Slasher?

Boneshard Slasher is a Creature — Horror. Its oracle text reads: "Flying Threshold — As long as seven or more cards are in your graveyard, this creature gets +2/+2 and has "When this creature becomes the target of a spell or ability, sacrifice it." Power/Toughness: 1/1"

Creature — Horror

Flying

Threshold — As long as seven or more cards are in your graveyard, this creature gets +2/+2 and has "When this creature becomes the target of a spell or ability, sacrifice it."

Power/Toughness: 1/1

Set Torment

Rarity Uncommon

Mana Value 2

Artist Ron Spencer

Collector # 50

Scryfall