Number EightCorrupted Conscience Poor Karn, infected by Phyrexian oil and bent toward evil
When you sacrifice Disturbing Mirth, manifest dread
Aside from being essential, the card was released with a quarter century printing in Legacy of Destruction, giving players a chance to pull an even rarer variant
You only untap one creature, but thats plenty exploitable with cards like The Infamous Cruelclaw, Roxanne, Starfall Savant, and any other creatures with valuable saboteur or attack triggers you want to get multiple times a turn
If just one of the cards didn't line up with this theory, we could perhaps dismiss it as such, but this is just too perfect a fit
Special Cards x 6, Treasure Rare x 1, Leader Cards x 6, Secret Rare x 2, Super Rare x 10, Rare x 26, Uncommon x 30, Common x 45, DON