Harmonic Oscillation - MP16-EN028 - Common - 1st Edition from 2016 Mega-Tin Mega Pack 1st Edition, available at 401 Games Canada.

• Rarity: Common
• Card Text:
  If your opponent has 2 cards in their Pendulum Zones: Target those 2 cards; while both targets are in their Pendulum Zones, you can Pendulum Summon using their Pendulum Scales this turn, but only from the Extra Deck.