Is Elvish Refueler legal in Standard, Modern, and Commander?

Elvish Refueler is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Elvish Refueler

Q: What type of card is Elvish Refueler?

Elvish Refueler is a Creature — Elf Druid. Its oracle text reads: "During your turn, as long as you haven't activated an exhaust ability this turn, you may activate exhaust abilities as though they haven't been activated. Exhaust — {1}{G}: Put a +1/+1 counter on this creature. (Activate each exhaust ability only once.) *"Anyone running low?"* Power/Toughness: 2/3"

Creature — Elf Druid

During your turn, as long as you haven't activated an exhaust ability this turn, you may activate exhaust abilities as though they haven't been activated.

Exhaust — : Put a +1/+1 counter on this creature. (Activate each exhaust ability only once.)