The Filigree Sylex

A doomsday device that has to build its own countdown one tap at a time, and the number it finally lands on is the whole strategic problem. The sweeper destroys nonland permanents whose mana value exactly matches its oil-counter total, so you are never clearing "everything above a threshold"; you are erasing precisely the mana value you chose to wait for, and nothing else. Because it enters empty and grows only by tapping, reaching a given count costs a turn per counter (short of external untappers), which makes the timing a genuine commitment: three counters means three activations spent to blow up threes, while the twos and fives sit untouched. That precision cuts both ways. It can be a surgical answer to a single problematic curve slot, or a badly-timed reset that whiffs on the very permanent you built it to kill. The kill ability is the more ominous one, pooling ten oil counters from across your permanents to throw ten damage at any target, converting a slow accumulation engine into a finisher that ignores the board entirely. What ties the design together is that all three activations route through the same currency: one tap builds oil, one tap-and-sacrifice spends the stockpile to reset a mana value, one tap-and-sacrifice cashes it for ten to the face. The card belongs to a deck that banks oil as a stored resource rather than incidental chip damage, and it punishes patience exactly as much as any clock the opponent can watch counting.