Aetheric Amplifier

Mana rocks that do a second thing are a well-worn category, but this one pairs its ramp with an effect that scales off the entire counter economy: activate for four and either double every kind of counter on a chosen permanent or double every kind of counter you hold. That second mode is the tell. A design that reads counters on the player, not just on permanents, is built for the plane's energy tokens, poison, experience, and any other counter a player accumulates rather than a creature carries. Doubling a stack of energy or pushing a poison total from five to ten changes what a table is racing toward, and it does so from a colorless slot any deck can run. The sorcery-speed restriction is what keeps the doubling from becoming a combat-step blowout: you commit to the multiplication on your own turn, in the open, with no ambush window on a proliferate-heavy board. The mana ability is the floor that justifies the inclusion; the counter-doubling is the payoff you build toward. It is a rock first and a counters engine second, and the split is deliberate: the ramp earns it a spot early, and the four-mana activation gives it a late-game ceiling once the counters you care about have piled up.