Is Thundertrap Trainer legal in Standard, Modern, and Commander?

Thundertrap Trainer is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Thundertrap Trainer

Q: What type of card is Thundertrap Trainer?

Thundertrap Trainer is a Creature — Otter Wizard. Its oracle text reads: "Offspring {4} (You may pay an additional {4} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) When this creature enters, look at the top four cards of your library. You may reveal a noncreature, nonland card from among them and put it into your hand. Put the rest on the bottom of your library in a random order."

Creature — Otter Wizard

Offspring (You may pay an additional as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.)

When this creature enters, look at the top four cards of your library. You may reveal a noncreature, nonland card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Set Bloomburrow

Rarity Rare

Mana Value 2

Artist Matt Stewart

Collector # 78

Scryfall Gatherer