Dark Contract with the Eternal Darkness

Card text

While you have 2 "D/D" cards in your Pendulum Zones, your opponent cannot target monsters on the field with Spell/Trap effects, Tribute them for a Tribute Summon, nor use them as Materials for a Fusion, Synchro, or Xyz Summon. Once per turn, during your Standby Phase: Take 1000 damage.