You will achieve a duel assessment of 7000 If you can inflict over 9999 damage with Cerberus's attack while no card is in your deck and just 100 your Life Points remain. You can increase the score by 200 by each time you use Prismatic Card.
Special summons an Amazoness monster from the graveyard without cost.
How to defeat Mai's deck
Remove Amazoness Village first
Mai's side of the field never become empty while the Amazoness Village field spell is activated. To allow your monsters to attack Mai's life points directly, you should destroy the field spell and prevent amazoness reinforcements from being special summoned.