Is Combat Courier legal in Standard, Modern, and Commander?

Combat Courier is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Combat Courier

Q: What type of card is Combat Courier?

Combat Courier is an Artifact Creature — Construct. Its oracle text reads: "{2}, Sacrifice this creature: Draw a card. Unearth {U} ({U}: 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.) Power/Toughness: 1/1"

Artifact Creature — Construct

, Sacrifice this creature: Draw a card.

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.)