Strionic Resonator (Borderless) [The Lost Caverns of Ixalan Commander]

Set: The Lost Caverns of Ixalan Commander Type: Artifact Rarity: Rare Cost: {2} {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.") "Akal theorizes that it is some sort of signal, resonating beyond this cavern's physical space. But if so, who—or what—is the signal for?" —Huatli's travel journal