Is Afterburner Expert legal in Standard, Modern, and Commander?

Afterburner Expert is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Afterburner Expert

Q: What type of card is Afterburner Expert?

Afterburner Expert is a Creature — Goblin Artificer. Its oracle text reads: "Exhaust — {2}{G}{G}: Put two +1/+1 counters on this creature. (Activate each exhaust ability only once.) Whenever you activate an exhaust ability, return this card from your graveyard to the battlefield."