A checklist, some explanations, and even some math
Five Hundred Year Diary Marcy: I agree with Loxi, although man this card could be REAL scary in some other decks that love to generate clues
You can always wheel and deal with cards like Windfall and Wheel of Fortune to refill your hand and keep the pressure on
All you need is a sacrifice outlet and fodder (preferably a recurable one), and you can burn everyone out of the game in one turn
This is just card disadvantage, so you need to get significant tempo for it to be worth it and/or have lots of Opus triggers
That versatility makes it an excellent answer to strategies like Hammer Time, Enchantress, or Murktide, where key threats often fall into those categories