Pumprincess the Princess of Ghosts

If this face-up card is destroyed while in a Monster Zone, you can place it face-up in your Spell & Trap Zone as a Continuous Spell Card, instead of sending it to the Graveyard. While this card is treated as a Continuous Spell Card by this effect, during each player's Standby Phase: Place 1 Pumpkin Counter on this card. All monsters your opponent controls lose 100 ATK and DEF for each Pumpkin Counter on this card.