Is Archpriest of Shadows legal in Standard, Modern, and Commander?

Archpriest of Shadows is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Archpriest of Shadows

Q: What type of card is Archpriest of Shadows?

Archpriest of Shadows is a Creature — Human Warlock. Its oracle text reads: "Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following abilities until end of turn.) Deathtouch Whenever this creature deals combat damage to a player or battle, return target creature card from your graveyard to the battlefield."

Creature — Human Warlock

Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following abilities until end of turn.)

Deathtouch

Whenever this creature deals combat damage to a player or battle, return target creature card from your graveyard to the battlefield.

Set March of the Machine

Rarity Rare

Mana Value 5

Artist Fariba Khamseh

Collector # 89

Scryfall Gatherer