Castle of Dark Illusions
Flip Effect Monster
DARK Fiend
★4 ATK 920 DEF 1930
FLIP: All Zombie-Type monsters gain 200 ATK and DEF. During each of your next 4 Standby Phases, each of those Zombie-Type monsters gains 200 more ATK and DEF. These effects last as long as this card is face-up on the field.