We dont know how much he paid for the card, but it was probably a lot of money, with reports valuing it between $1 and 2 million
So the field of application is really wide for Sticky Fingers, while the cost is minimal
It had a place alongside Shining Shoal and Sickening Shoal, too, where in an emergency it could redirect 4 damage or give something -4/-4
Sometimes these are self-explanatory, like Esper Pixie
Casting Cost: Card Type: Legendary Creature - Astartes Warrior Power / Toughness: 5 / 5 Card Text: Trample Mark of the Chaos Ascendant - During your turn, spells you cast from your hand with mana value X or less have cascade, where X is the total amount of life your opponents have lost this turn
PrintMTGs proxy/playtest cards are designed around that in-sleeve consistency idea: standard MTG sizing, familiar feel, and predictable finishing so your deck doesnt end up with one card that behaves like its trying to get caught