Given how Steamflogger Boss, the first Contraption card, actually debuted in a black border set, that would probably be most players first guess
It generates energy counters equal to the number of nonbasic lands an opponent controls when it comes into play, and then allows you to spend four energy to destroy a nonbasic land and make nonflying creatures unable to block each time it attacks
This monochrome masterpiece is the definitive chase card for Black Bolt collectors
7.3/10$0.60 Nightveil Specter Creature Specter 2/3 Flying Whenever this creature deals combat damage to a player, that player exiles the top card of their library
The Companion mechanic alone broke that, allowing players to access a card from their sideboard as long as their deck met the right conditions
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