According to Talker , he thought they might be worth a few hundred dollars
Abrupt Decay (71 copies) Abrupt Decay is an uncounterable removal spell, making it incredibly efficient for dealing with any non-land threat costing three mana or less
As an example, let's look at Fact or Fiction, originally from Invasion : This card is very powerful, but only in the hands of a player who knows how to correctly use it
This last point bears teasing out a bit
(You may cast cards from your graveyard for their escape cost.) Legendary Creature Enchantment - Horror Commander (CTRL to add secondary) Artifact Artifact (CTRL to add secondary) Card advantage Overlord of the Floodpits Impending 4 (If you cast this spell for its impending cost, it enters with four time counters and isn't a creature until the last is removed
The prototype cost always results in less power and toughness, and a lower mana cost