Is Starseer Mentor legal in Standard, Modern, and Commander?

Starseer Mentor is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Starseer Mentor

Q: What type of card is Starseer Mentor?

Starseer Mentor is a Creature — Bat Warlock. Its oracle text reads: "Flying, vigilance At the beginning of your end step, if you gained or lost life this turn, target opponent loses 3 life unless they sacrifice a nonland permanent of their choice or discard a card. *"Each star is given a name befitting its grandeur. This one is called Aurax, the Night-Eater. That one is called Blinky."* Power/Toughness: 3/5"

Creature — Bat Warlock

Flying, vigilance

At the beginning of your end step, if you gained or lost life this turn, target opponent loses 3 life unless they sacrifice a nonland permanent of their choice or discard a card.

*"Each star is given a name befitting its grandeur. This one is called Aurax, the Night-Eater. That one is called Blinky."*

Power/Toughness: 3/5

Set Bloomburrow

Rarity Uncommon

Mana Value 5

Artist Taras Susak

Collector # 233

Scryfall