Is Ancient Bronze Dragon legal in Standard, Modern, and Commander?

Ancient Bronze Dragon is legal in: Legacy, Vintage, Commander, Historic.

Ancient Bronze Dragon

Q: What type of card is Ancient Bronze Dragon?

Ancient Bronze Dragon is a Creature — Elder Dragon. Its oracle text reads: "Flying Whenever this creature deals combat damage to a player, roll a d20. When you do, put X +1/+1 counters on each of up to two target creatures, where X is the result."

Creature — Elder Dragon

Flying

Whenever this creature deals combat damage to a player, roll a d20. When you do, put X +1/+1 counters on each of up to two target creatures, where X is the result.

Set Commander Legends: Battle for Baldur's Gate

Rarity Mythic Rare

Mana Value 7

Artist Johan Grenier

Collector # 214

Scryfall Gatherer