Is Herald of the Dreadhorde legal in Standard, Modern, and Commander?

Herald of the Dreadhorde is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Herald of the Dreadhorde

Q: What type of card is Herald of the Dreadhorde?

Herald of the Dreadhorde is a Creature — Zombie Warrior. Its oracle text reads: "When this creature dies, amass Zombies 2. (Put two +1/+1 counters on an Army you control. It's also a Zombie. If you don't control an Army, create a 0/0 black Zombie Army creature token first.)"

Creature — Zombie Warrior

When this creature dies, amass Zombies 2. (Put two +1/+1 counters on an Army you control. It's also a Zombie. If you don't control an Army, create a 0/0 black Zombie Army creature token first.)

Set War of the Spark

Rarity Common

Mana Value 4

Artist Heonhwa Choe

Collector # 93

Scryfall Gatherer