Is Council Guardian legal in Standard, Modern, and Commander?

Council Guardian is legal in: Legacy, Vintage, Commander.

Council Guardian

Q: What type of card is Council Guardian?

Council Guardian is a Creature — Giant Soldier. Its oracle text reads: "Will of the council — When this creature enters, starting with you, each player votes for blue, black, red, or green. This creature gains protection from each color with the most votes or tied for most votes. Power/Toughness: 5/5"

Creature — Giant Soldier

Will of the council — When this creature enters, starting with you, each player votes for blue, black, red, or green. This creature gains protection from each color with the most votes or tied for most votes.

Power/Toughness: 5/5

Set Conspiracy

Rarity Uncommon

Mana Value 6

Artist Volkan Baǵa

Collector # 15

Scryfall