ebay mtg final fantasy THE WIND CRYSTAL RARE 4x Sephiroth's Intervention MTG Final

You can harp about how its obvious, but its probably the card here thats the least likely to be questioned (except for number six below)

Prior to Duress the discard effects in black were either over powered RNG hell like Mind Twist and Hymn to Tourach or pretty low powered

Finally, Enter the God-Eternals is pricey, but it slams the door on aggressive decks and, in a mill deck, often acts as a three-for-one

Collector Booster [Omega] (Magic Final Fantasy | Magic Cards) prices are based on the historic sales

Ulamog cost 10 for a 7/7 that has ward sac two permanents to affect their board and a cast trigger to exile half of a foe's library