Is Grixis Slavedriver legal in Standard, Modern, and Commander?

Grixis Slavedriver is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Grixis Slavedriver?

Grixis Slavedriver is a Creature — Zombie Giant. Its oracle text reads: "When this creature leaves the battlefield, create a 2/2 black Zombie creature token. Unearth {3}{B} ({3}{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.)"

Grixis Slavedriver

Creature — Zombie Giant

When this creature leaves the battlefield, create a 2/2 black Zombie creature token.

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.)