Is Champion of Rhonas legal in Standard, Modern, and Commander?

Champion of Rhonas is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Champion of Rhonas

Q: What type of card is Champion of Rhonas?

Champion of Rhonas is a Creature — Jackal Warrior. Its oracle text reads: "You may exert this creature as it attacks. When you do, you may put a creature card from your hand onto the battlefield. (An exerted creature won't untap during your next untap step.) *The only way to finish the Trial of Strength is with a basilisk scale in hand.* Power/Toughness: 3/3"

Creature — Jackal Warrior

You may exert this creature as it attacks. When you do, you may put a creature card from your hand onto the battlefield. (An exerted creature won't untap during your next untap step.)

*The only way to finish the Trial of Strength is with a basilisk scale in hand.*

Power/Toughness: 3/3

Set Amonkhet

Rarity Rare

Mana Value 4

Artist Winona Nelson

Collector # 159

Scryfall