Synchro Gift (DP10-EN024) - Duelist Pack 10: Yusei 3 Unlimited

Select 1 face-up Synchro Monster and 1 face-up non-Synchro Monster you control. Until the End Phase, the ATK of that Synchro Monster becomes 0 and the non-Synchro Monster gains ATK equal to the original ATK of that Synchro Monster.