Strionic Resonator is a rare Artifact card from The Lost Caverns of Ixalan Commander (LCC), collector number 116. Current market price: $17.53 (foil $57.83), TCGplayer market prices via Scryfall.
{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.")