Is Fall of the Hammer legal in Standard, Modern, and Commander?

Fall of the Hammer is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

What type of card is Fall of the Hammer?

Fall of the Hammer is an Instant. Its oracle text reads: "Target creature you control deals damage equal to its power to another target creature."

Instant

Target creature you control deals damage equal to its power to another target creature.

Set Pioneer Masters

Rarity Common

Artist Adam Paquette

Instant Modern Pioneer Commander