Is Nightmare Lash legal in Standard, Modern, and Commander?

Nightmare Lash is legal in: Modern, Legacy, Vintage, Commander.

Nightmare Lash

Q: What type of card is Nightmare Lash?

Nightmare Lash is an Artifact — Equipment. Its oracle text reads: "Equipped creature gets +1/+1 for each Swamp you control. Equip—Pay 3 life. (Pay 3 life: Attach to target creature you control. Equip only as a sorcery. This card enters unattached and stays on the battlefield if the creature leaves.)"

Artifact — Equipment

Equipped creature gets +1/+1 for each Swamp you control.

Equip—Pay 3 life. (Pay 3 life: Attach to target creature you control. Equip only as a sorcery. This card enters unattached and stays on the battlefield if the creature leaves.)

Set Mirrodin

Rarity Rare

Mana Value 4

Artist Puddnhead

Collector # 219

Scryfall