Is Ashnod's Harvester legal in Standard, Modern, and Commander?

Ashnod's Harvester is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Ashnod's Harvester?

Ashnod's Harvester is an Artifact Creature — Construct. Its oracle text reads: "Whenever this creature attacks, exile target card from a graveyard. Unearth {1}{B} ({1}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)"

Ashnod's Harvester

Artifact Creature — Construct

Whenever this creature attacks, exile target card from a graveyard.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)