You do have an Hour of Glory as answer to the first one of these, but game 1 is as bad as it gets but things improve a bit after board: Clearly Transgress the Mind is the huge addition here
Thankfully, looking through the list I'd say that WotC did the best job here
Most cards fall off after release, while only a few maintain their value
Ghen, Arcanum Weaver Ghen, Arcanum Weaver is often fielded at the helm of curse-themed decks since it has access to some of the best enchant player auras and can cycle them in and out of the graveyard easily
Seeing as Ghave was once a respectable $7 and Karador commanded over $20 for a time, this is bonkers to me, but time marches on
My favorite is in an Ashling the Pilgrim deck, where you can combine Ashling with a Basilisk Collar and the Scythe to wipe the entire board each turn, returning every creature destroyed to the battlefield under your control