Is Boom Scholar legal in Standard, Modern, and Commander?

Boom Scholar is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Boom Scholar?

Boom Scholar is a Creature — Goblin Advisor. Its oracle text reads: "Exhaust abilities of other permanents you control cost {2} less to activate. Exhaust — {4}{R}{G}: Creatures and Vehicles you control gain trample until end of turn. Put two +1/+1 counters on this creature. (Activate each exhaust ability only once.) Power/Toughness: 3/3"

Boom Scholar

Creature — Goblin Advisor

Exhaust abilities of other permanents you control cost less to activate.

Exhaust — : Creatures and Vehicles you control gain trample until end of turn. Put two +1/+1 counters on this creature. (Activate each exhaust ability only once.)