Is Duty-Bound Dead legal in Standard, Modern, and Commander?

Duty-Bound Dead is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Duty-Bound Dead?

Duty-Bound Dead is a Creature — Skeleton. Its oracle text reads: "Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) {3}{B}: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.) Power/Toughness: 0/2"

Duty-Bound Dead

Creature — Skeleton

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)