[TIP] STRONGER EFFECT DAMAGE If you play with cards that inflict Effect Damage, you can use them more effectively by using "Dark Room of Nightmare".
With "Mass Driver", you can inflict 700 total damage each time you Tribute 1 monster. Also, if you have "Coffin Seller" on your side of the field, you can inflict 600 total-damage each time your opponent's monster is sent to the Graveyard.