Is Boneyard Mycodrax legal in Standard, Modern, and Commander?

Boneyard Mycodrax is legal in: Legacy, Vintage, Commander.

What type of card is Boneyard Mycodrax?

Boneyard Mycodrax is a Creature — Fungus. Its oracle text reads: "Boneyard Mycodrax's power and toughness are each equal to the number of other creature cards in your graveyard. Scavenge {4}{B} ({4}{B}, 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.)"

Boneyard Mycodrax

Creature — Fungus

Boneyard Mycodrax's power and toughness are each equal to the number of other creature cards in your graveyard.

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.)