Shion's Hymn (TMS-045) [The Moonlit Savior]

Put target resonator on top of its owner's main deck. Reveal the top card of your main deck. It i's a water resonator with total cost 2 or less, put it into your field. As long as your J-ruler is "Coup d'Etat Mastermind, Shion", you may pay UU less to play its God's Art abilities this turn.