Is Kill-Suit Cultist legal in Standard, Modern, and Commander?

Kill-Suit Cultist is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Kill-Suit Cultist?

Kill-Suit Cultist is a Creature — Goblin Berserker. Its oracle text reads: "This creature attacks each combat if able. {B}, Sacrifice this creature: The next time damage would be dealt to target creature this turn, destroy that creature instead. *Dressed to kill.* Power/Toughness: 1/1"