Cybership

Most theft effects treat the top of an opponent's deck as raw material: a random card exiled, cast for free, or otherwise scavenged. This one skips the card as a card entirely and installs it as a body. Two cards off the defending player's library flip face down and become 2/2 Cyberman artifact creatures under your control, their identity scrubbed in transit: mana value 0, no color, no text, just fodder converted from a resource the defender never chose to spend, and no clause anywhere that lets those faces turn back up. The design fantasy is on the nose (the Cybermen upgrade the people they beat), but the engine underneath is a compounding conversion loop that widens your board while thinning their deck one attack at a time. The tension lives in the cost of admission. An 8/8 flier is a genuine finisher, but Crew 4 is a stiff toll: you have to commit four power of other creatures before it swings, so the payoff only arrives once you already command a board worth tapping. Then the loop feeds itself, since each connection manufactures two fresh 2/2s that can crew it next turn. And because the face-down bodies are the opponent's actual library cards rather than tokens, every hit permanently strips two cards from a deck the defender never got to draw, so the board you assemble doubles as a slow, one-attack-at-a-time decking clock.