Heavily printed modern sets flood the market
Because rare slots are split between Holo Rare, Pokemon-ex, Secret Rare, Shining, Crystal and Gold Star tiers (depending on the era), individual ultra-rare odds can run an order of magnitude lower than headline 1-in-3 holo-slot rates
Again, it's not card advantage in and of itself (since you draw three, and then discard three + lose the Coliseum), but it combines famously with Deep Analysis and madness cards (such as Circular Logic), and its effect can't be counterspelled
Not just because they chuck a whole pile of new cards at you (which they certainly do) but because while MTG has been one of the best card games for the last three decades, the Commander format is a particular favorite among players
Anyway, here's Selesnya Eulogist
Many of the cards felt like they were designed as popular mechanics first and had the most talked about FF games of our generation slapped on them