Pumpking the King of Ghosts (MRD-EN079) - Metal Raiders (25th Anniversary Edition) Unlimited

If Castle of Dark Illusions is face-up on the Field, increase the ATK and DEF of this card by 100 points. As long as Castle of Dark Illusions remains face-up on the Field, the ATK and DEF of this card continues to increase by 100 points during each of your Standby Phases. This effect continues until your 4th turn after the card is activated.