Is Cromat legal in Standard, Modern, and Commander?

Cromat is legal in: Legacy, Vintage, Commander.

What type of card is Cromat?

Cromat is a Legendary Creature — Illusion. Its oracle text reads: "{W}{B}: Destroy target creature blocking or blocked by Cromat. {U}{R}: Cromat gains flying until end of turn. {B}{G}: Regenerate Cromat. {R}{W}: Cromat gets +1/+1 until end of turn. {G}{U}: Put Cromat on top of its owner's library. Power/Toughness: 5/5"