Is Alpine Houndmaster legal in Standard, Modern, and Commander?

Alpine Houndmaster is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Alpine Houndmaster

Q: What type of card is Alpine Houndmaster?

Alpine Houndmaster is a Creature — Human Warrior. Its oracle text reads: "When this creature enters, you may search your library for a card named Alpine Watchdog and/or a card named Igneous Cur, reveal them, put them into your hand, then shuffle. Whenever this creature attacks, it gets +X/+0 until end of turn, where X is the number of other attacking creatures."

Creature — Human Warrior

When this creature enters, you may search your library for a card named Alpine Watchdog and/or a card named Igneous Cur, reveal them, put them into your hand, then shuffle.

Whenever this creature attacks, it gets +X/+0 until end of turn, where X is the number of other attacking creatures.

Set Core Set 2021

Rarity Uncommon

Mana Value 2

Artist Mark Behm

Collector # 215

Scryfall Gatherer