Flowstone Surge

Most board-wide buffs sweeten the deal: a matching toughness bump, a recurring activation cost to gate the upside, some kind of off-switch. This one runs the math the other way. Every creature you control trades a toughness for a power, statically, for as long as the enchantment sits on the battlefield, with no activation and no way to turn it off. The toughness penalty is the entire engine. It functions like a one-sided sweeper aimed at your own X/1s, erasing one-toughness bodies the instant it resolves and leaving anything below the cost line as collateral. The payoff is that it asks for nothing after two mana: assemble bodies thick enough to eat the drawback, and the static does the rest forever. That demand on the deckbuilder is the cost the rate hides. The double-edged enchantment was a recurring shape in that late-block design era, costs that read clean on the card but require the whole deck around them to be built to absorb the edge. Few of them cut as sharply against their own controller as this one does.