You can only use the (1) effect of “Tuning Gum” once per turn.
(1) Target 1 face-up monster you control; that monster is treated as a Tuner this turn. During the turn this effect is activated, Synchro Monsters you control cannot declare an attack.
(2) When a card or effect targets only 1 Synchro Monster you control: You can banish this card from the Graveyard; negate that activation.
Atom 1.0
