Is Visions of Dread legal in Standard, Modern, and Commander?

Visions of Dread is legal in: Legacy, Vintage, Commander.

What type of card is Visions of Dread?

Visions of Dread is a Sorcery. Its oracle text reads: "Target opponent puts a creature card of their choice from their graveyard onto the battlefield under your control. Flashback {8}{B}{B}. This spell costs {X} less to cast this way, where X is the greatest mana value of a commander you own on the battlefield or in the command zone. (You may cast this card from your graveyard for its flashback cost. Then exile it.)"

Visions of Dread

Sorcery

Target opponent puts a creature card of their choice from their graveyard onto the battlefield under your control.

Flashback . This spell costs less to cast this way, where X is the greatest mana value of a commander you own on the battlefield or in the command zone. (You may cast this card from your graveyard for its flashback cost. Then exile it.)