Is Strionic Resonator legal in Standard, Modern, and Commander?

Strionic Resonator is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Strionic Resonator

Q: What type of card is Strionic Resonator?

Strionic Resonator is an Artifact. Its oracle text reads: "{2}, {T}: Copy target triggered ability you control. You may choose new targets for the copy. (A triggered ability uses the words "when," "whenever," or "at.")"

Artifact

, : Copy target triggered ability you control. You may choose new targets for the copy. (A triggered ability uses the words "when," "whenever," or "at.")