Root Snare

The Fog effect in its plainest casing, taxed one mana above the spell it descends from. The original set the template for the trick: turn off a turn's worth of combat for a single green mana, then dare the attacker to have wasted the swing. This version buys the same window at two mana, and it buys nothing else. No scry, no cantrip, no attached clause to soften the upcharge. That makes it a curiosity within its own lineage, because green has printed a long line of damage-prevention instants and most of the later ones justify their slot by stapling a second effect onto the prevention. This one refuses to. It prevents all combat damage for the turn and stops, which leaves its entire worth in when you cast it rather than what you cast. Every Fog lives on the bluff and the blowout: hold it up, let an opponent commit to a lethal-looking alpha strike, then erase the arithmetic after they are already tapped out and exposed. Because it touches only combat damage, it answers nothing that comes from outside the attack step: burn spells, pingers, and direct-damage effects all sail through. Dead in most games, a one-card win in the exact turn it was saved for.