Is Charred Graverobber legal in Standard, Modern, and Commander?

Charred Graverobber is legal in: Legacy, Vintage, Commander.

What type of card is Charred Graverobber?

Charred Graverobber is a Creature — Skeleton Mercenary. Its oracle text reads: "When this creature enters, return target outlaw card from your graveyard to your hand. Escape—{3}{B}{B}, Exile four other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.) This creature escapes with a +1/+1 counter on it."