Elenda, the Dusk Rose ( Rivals of Ixalan ) Elenda, the Dusk Rose was always on the border of greatness until they changed the Commander dies trigger rules
Again, like so many of the Heroes on this list, it's a fantastic card that could easily slot into the current meta, but also lends itself well to being an early draft pick, and could hold its own in a Commander deck
Starting with the Aetherdrift set, they come in booster boxes of 30 packs (previously 36), which cost around 120-140 USD at launch and then usually stabilize around 100-110 USD
You move the stats around a bit and add in the ability to make a second 3/3 on the following turn and it's pretty clear how much of an upgrade this is
Foil Scion spiked to $50 at the end of last year in anticipation of the influx of dragons from Dragons of Tarkir and once more to $70 in the middle of March this year