Is Dreg Mangler legal in Standard, Modern, and Commander?

Dreg Mangler is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Dreg Mangler

Q: What type of card is Dreg Mangler?

Dreg Mangler is a Creature — Plant Zombie. Its oracle text reads: "HasteScavenge {3}{B}{G} ({3}{B}{G}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)"

Creature — Plant Zombie

Haste<br>Scavenge (, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)