Is First Response legal in Standard, Modern, and Commander?

First Response is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

First Response

Q: What type of card is First Response?

First Response is an Enchantment. Its oracle text reads: "At the beginning of each upkeep, if you lost life last turn, create a 1/1 white Soldier creature token. *"There's never a good time for a disaster or an attack. That's why we're here." —Oren, militia captain*"