Is Blistering Dieflyn legal in Standard, Modern, and Commander?

Blistering Dieflyn is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Blistering Dieflyn

Q: What type of card is Blistering Dieflyn?

Blistering Dieflyn is a Creature — Imp. Its oracle text reads: "Flying {B/R}: This creature gets +1/+0 until end of turn. *Any kithkin smith would love to catch a dieflyn for her kiln, relieving her of ever having to gather fuel again.* Power/Toughness: 0/1"