Vintage sets from the late 1990s had limited print runs and are long out of print, so their cards are inherently harder to find now
Secret Numbers Some cards may have a secret number higher than the actual number
For the first time ever, every Commander deck includes a 2-card Collector Booster Sample Pack in which you can find a nice taste of the great showcase cards from the set
Finally, Sagas themselves are an increasingly well-supported card type with powerful, interesting commander options like Tom BombadilTom Bombadil, Narci, Fable SingerNarci, Fable Singer, and Sigurd, Jarl of RavensthorpeSigurd, Jarl of Ravensthorpe
Altar of Dementia is a free sac outlet that can mill players out with the right combination of recursive creatures, though its also great at fueling your own graveyard, too
The Mirari Conjecture The Mirari Conjecture is a good bit of recursion, but its best chapter is definitely its third