Is Swarm Guildmage legal in Standard, Modern, and Commander?

Swarm Guildmage is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Swarm Guildmage

Q: What type of card is Swarm Guildmage?

Swarm Guildmage is a Creature — Elf Shaman. Its oracle text reads: "{4}{B}, {T}: Creatures you control get +1/+0 and gain menace until end of turn. (They can't be blocked except by two or more creatures.) {1}{G}, {T}: You gain 2 life. Power/Toughness: 2/2"