Is Sparring Regimen legal in Standard, Modern, and Commander?

Sparring Regimen is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Sparring Regimen

Q: What type of card is Sparring Regimen?

Sparring Regimen is an Enchantment. Its oracle text reads: "When this enchantment enters, learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.) Whenever you attack, put a +1/+1 counter on target attacking creature and untap it."

Enchantment

When this enchantment enters, learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

Whenever you attack, put a +1/+1 counter on target attacking creature and untap it.

Set Strixhaven: School of Mages

Rarity Rare

Mana Value 3

Artist Tomasz Jedruszek

Collector # 29

Scryfall