Azul lost the second game in a few minutes, and for Sander to finish the game took much longer because the process of returning resources from the discard to the hand is painfully slow
Darkness is a fun one -- the spell effect does have the idea of sudden darkness happening in the midst of combat (hence creatures still being 'tapped') and causing all the attackers to miss their mark (hence no damage is dealt)
On the other hand, the Transformers cards are new and unique in design, mechanics, and gameplay
In lightly played (LP) condition, first edition copies of this card can reach as much as $360, though there's a severe lack of further sales data to analyze for first edition cards
Charizard cards vary widely in value and can be worth anywhere from $25 to over $50,000
At this point, most of us think of Acidic Slime as a core set staple because it has been available for the last three years