|Yu-Gi-Oh! Card Singles - Tip Card |
"Trap Hole" is a strong card but can only be used at very specific times. You can only use it immediately after your opponent Normal Summons or Flip Summons a monster with an ATK of 1000 points or more.
You can not use it when your opponent Sets a monster, when your opponent Special Summons a monster, or when a monster is flipped face-up by an attack or by a card effect like "Swords of Revealing Light".
You look at the monster's ATK including effects on the field like Field Spell Cards or Continuous Effects from the monster itself. If your opponent Summons "Flash Assailant", and has 3 cards in his/her hand afterwards, then the ATK of "Flash Assailant" is 800 points even though the original ATK printed on the card is 2000 points, because "Flash Assailant"'s ATK is decreased by 400 points for each card in the controller's hand. You cannot use "Trap Hole" in this case.