Is Exterminator Magmarch legal in Standard, Modern, and Commander?

Exterminator Magmarch is legal in: Legacy, Vintage, Commander.

Exterminator Magmarch

Q: What type of card is Exterminator Magmarch?

Exterminator Magmarch is an Artifact Creature — Phyrexian Construct. Its oracle text reads: "Whenever you cast an instant or sorcery spell that targets only a single nonland permanent an opponent controls, if another opponent controls one or more nonland permanents that spell could target, choose one of those permanents. Copy that spell. The copy targets the chosen permanent. {1}{B}: Regenerate this creature."

Artifact Creature — Phyrexian Construct

Whenever you cast an instant or sorcery spell that targets only a single nonland permanent an opponent controls, if another opponent controls one or more nonland permanents that spell could target, choose one of those permanents. Copy that spell. The copy targets the chosen permanent.

: Regenerate this creature.