Mirror of Fate

A puzzle piece in search of a puzzle, this asks a strange question for an artifact: what would you do if you could rewrite the top of your library from scratch? The catch is the input. You can only stack cards already exiled face-up, which means the card does nothing until some other engine has built you a pool of exiles to draw from. That dependency is the whole design, and it is why this has lived its life as combo fuel rather than a value piece. The most notorious use is the reverse mill kill: exile your own graveyard or library somewhere face-up, then sacrifice this to empty what remains and replace it with a stack you chose, turning a near-empty library into either a curated draw or a deliberate self-deck depending on the build. It also blanks library-stacking from the opponent by overwriting it entirely, and it pairs naturally with any effect that face-up exiles cards you can later reclaim. The colorless cost is the enabler, letting any deck slot it regardless of identity, which is exactly why the combo applications have always outweighed any honest attempt to use it as a tutor-adjacent fixer. Outside the setups built specifically around it, it is a do-nothing artifact; inside them, it is a one-card library reset that turns prior exile work into a precise, often lethal, payoff.