If you have Castle of Dark Illusions and Pumpking on the field at the same time then due to both of their effects, Pumpking can gain 300 Atk. and Def. each turn. the only downside to this is that it only lasts 4 turns. But, if you have multiples of CODI the Pumpking can get raised 1200 at the end of the 4 turn effect per CODI. Plus it strengthens any zombie types. And furthermore, you can use Monster Reborn on CODI if was sent to the Graveyard. Magician of Faith can get back Monster Reborns that were used to revive CODI. And with normal magic cards like Violet Crystal, Sword of Dark Destruction, Wasteland ect., Pumpking can get an attack power higher than 9000. That's my Zombie tip. I hope it's helpful