Rotating Fireplace

A mana rock that grows itself, one counter at a time, but only ever when you pay for it. Most colorless-producing artifacts fix their output the moment they resolve: Sol Ring makes two forever, Worn Powerstone makes two forever. This one enters tapped and producing exactly one, then hands you a lever to crank it. Time travel is the growth mechanism, but the climb is patient by design: each activation edges a single counter onto the fireplace, because time travel touches one counter per eligible object rather than piling them onto a single target. That caps the burst and asks a real price for it, a sorcery-speed tax stacked on top of the tap, so moving from one mana to three is a deliberate investment rather than a windfall, and it never happens on its own. The wider synergy is not that the fireplace explodes when the board is loaded; it is that a single time travel reaches across every suspended card you own and time-countered permanent you control at once, nudging (or stalling) all of them together while it bumps the fireplace up by one. The design belongs to the small family of pieces built to treat the time counter as a resource you manage rather than a countdown clock you wait out, using the same mechanic that governs suspend's delay as something you can accelerate or freeze at will. On its own it is a slow battery you have to feed. In a shell already stuffed with time counters, it becomes one more dial that every time travel turns.