Is Blood Lust legal in Standard, Modern, and Commander?

Blood Lust is legal in: Legacy, Vintage, Commander, Pauper.

Blood Lust

Q: What type of card is Blood Lust?

Blood Lust is an Instant. Its oracle text reads: "If target creature has toughness 5 or greater, it gets +4/-4 until end of turn. Otherwise, it gets +4/-X until end of turn, where X is its toughness minus 1."

Instant

If target creature has toughness 5 or greater, it gets +4/-4 until end of turn. Otherwise, it gets +4/-X until end of turn, where X is its toughness minus 1.

Set Legends

Rarity Uncommon

Artist Anson Maddocks