Is Guide of Souls legal in Standard, Modern, and Commander?

Guide of Souls is legal in: Modern, Legacy, Vintage, Commander.

Guide of Souls

Q: What type of card is Guide of Souls?

Guide of Souls is a Creature — Human Cleric. Its oracle text reads: "Whenever another creature you control enters, you gain 1 life and get {E} (an energy counter). Whenever you attack, you may pay {E}{E}{E}. When you do, put two +1/+1 counters and a flying counter on target attacking creature. It becomes an Angel in addition to its other types."

Creature — Human Cleric

Whenever another creature you control enters, you gain 1 life and get (an energy counter).

Whenever you attack, you may pay . When you do, put two +1/+1 counters and a flying counter on target attacking creature. It becomes an Angel in addition to its other types.

Set Modern Horizons 3

Rarity Rare

Mana Value 1

Artist Ryan Valle

Collector # 29

Scryfall Gatherer