Who Wants It: White commander decks that are hurting for card advantage
Theres also Vault 87: Forced EvolutionVault 87: Forced Evolution, which will make you lose karma by stealing a creature, then giving you a +1/+1 counter and some card draw
I'll try to save you some reading, you attack with Arthur and one other creature, and you get a free dash creature from the top six of your library, and then that free attacker gets added to your hand
Approximately 39 were originally released and from those, only 10 are believed to remain
When a card performs well in tournaments, demand can rise as players try to copy winning decks, pushing the price up
Because most of the Reserved List cards that are widely owned (dual lands, Legacy staples) have been dropping while high-end Alpha and Beta cards have been making up the difference