OCG Rulings

• This card effect targets 1 Set Spell or Trap Card the opponent controls.^[1]

• Even if a Counter Trap Card like "Magic Jammer" is targeted by this card, it cannot be activated in a chain.^[1]

• If the opponent activates "Night Beam", cards other than the targeted card can be activated in a chain. Also, if a card other than the targeted card is activated, the card targeted by "Night Beam" can be activated later on the chain.^[2]

References

1. ↑ ^{1.0 1.1} Konami OCG FAQ: Spell Card > Night Beam
2. ↑ Konami OCG FAQ: If the opponent activates "Night Beam", can you activate a card other than the targeted card in a chain? Also, if this is possible, can the card targeted by "Night Beam" be activated later on the chain?