Two-color decks can often support something like 812 basics
His ultimate is Overrun which is fine
As a result, Charizard-focused collectors often prioritize this set, especially within discussions around the top trading card games where iconic characters drive long-term value
Instead of going to the graveyard, cards you discard get exiled
This cheap alternate win condition looks trivial to pull off with cards like Chasm Skulker / Toothy, Imaginary Friend + lots of card draw, Forgotten Ancient soaking up counters just by existing, and Vorel of the Hull Clade / Pir, Imaginative Rascal / Doubling Season doubling counters
Lastly, there's the question of Underworld Breach, Yawgmoth's Will, Monastery Mentor, or some combination of these