It's not necessary (or, in some cases, possible) to identify which roll was the third
Graveyard Overdrive sparked some amount of joy when I saw the lhurgoyf package, so this one wins the fun category, though Im pretty unenthused by everything thats not the lhurgoyf stuff
On the other hand, the required Extra Deck material is two-sided
In a typical Commander deck that doesn't build around her, that will likely be: Land - pretty sure Creature - likely Sorcery or Instant - at least one, maybe both Then maybe an artifact, enchantment or planeswalker That means you could easily draw four or five cards in a typical 10 set and choose the best one for the situation, like the best land your reveal
In practice, what Ive experienced is that Ive simply collected a bunch of cards Ive already collected, despite having barely played the game at all this summer