Is Boon-Bringer Valkyrie legal in Standard, Modern, and Commander?

Boon-Bringer Valkyrie is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Boon-Bringer Valkyrie

Q: What type of card is Boon-Bringer Valkyrie?

Boon-Bringer Valkyrie is a Creature — Angel Warrior. 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.) Flying, first strike, lifelink"

Creature — Angel Warrior

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.)

Flying, first strike, lifelink

Set March of the Machine

Rarity Rare

Mana Value 5

Artist Heonhwa Choe

Collector # 9

Scryfall Gatherer