Lamentis Deck

When Death is in your hand when Lamentis activates, it automatically becomes a free card. Duplicate it with Moon Girl so you have 2 free Death drops.

Leech is an essential card since both players have all the playable cards in the game already. Playing Leech on T5 after Moon girl or on T4 after playing Wave will definitely wreck the opponent's strategy since if they also have a Death in hand, it will automatically revert back to 9 cost.