Flowstone Blade

The Flowstone cycle was Tempest block's experiment in repeatable +1/-1 pumps, and this is the cheapest expression of the idea: a one-mana Aura that turns red mana into a firing pin. The economy is what makes it tick. Each activation trades one toughness for one power, which means the enchanted creature can punch up in combat or, more cynically, shoot itself down to clear the way for a finishing trick. Both halves of that stat swing are live: the +1 wins races and finishes off blockers, the -1 is a slow-motion sacrifice valve that costs only mana and time. The repeatability is the catch and the appeal. There is no limit to the activations beyond the red in your pool, so a creature can grow to lethal in one turn or whittle its own toughness to zero on demand, which lets it dodge bounce, theft, or an opposing edict by simply ceasing to exist on your terms. The same self-modifying body mechanic ran through Flowstone Mauler and the rest of the Flowstone cards, but as an Aura this one carries the usual two-for-one risk: kill the creature in response and the investment goes with it. Designed for an aggressive red deck that wanted a mana sink and a combat-math lever in the same slot, it reads as clean late-90s color-pie work rather than a card with much reach beyond it.