Is Coalition Flag legal in Standard, Modern, and Commander?

Coalition Flag is legal in: Legacy, Vintage, Commander.

Coalition Flag

Q: What type of card is Coalition Flag?

Coalition Flag is an Enchantment — Aura. Its oracle text reads: "Enchant creature you control Enchanted creature is a Flagbearer. While an opponent is choosing targets as part of casting a spell they control or activating an ability they control, that player must choose at least one Flagbearer on the battlefield if able."

Enchantment — Aura

Enchant creature you control

Enchanted creature is a Flagbearer.

While an opponent is choosing targets as part of casting a spell they control or activating an ability they control, that player must choose at least one Flagbearer on the battlefield if able.

Set Apocalypse

Rarity Uncommon

Mana Value 1

Artist Darrell Riche

Collector # 2

Scryfall Gatherer