At the beginning of your upkeep, put a credit counter on this creature
Sets (the 3 letter names printed at the bottom of cards) are ordered by the time they would rotate out within standard and in release order for that year
Plus in a format like Commander where everything is Highlander, you should just randomly have a few Zombies or changelings to bring back in many Black decks that are commonly played, so you can add this to your removal section,and then if you happen to have something to bring back, you can do that instead
He dreams of publishing a board game sometime in the future!
The second landfall flips over the creature
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