If my opponent has no Digimon or Tamers, does that mean that I can't activate this card's [Main] effect?
No, the effect still activates even when your opponent has no Digimon or Tamers.
Mar. 28, 2024
Does "you may play 1 Tamer card with the [Night Claw] or [Light Fang] trait from your hand without paying the cost" in this card's [Main] effect activate when my opponent doesn't have any Digimon or Tamers?
Yes, it activates.
Mar. 28, 2024