Shivan Fire

Two damage for one red mana is the price of admission fair removal has quietly agreed on, and the kicker is what stops the card from decaying into a blank once the board outgrows two toughness. Cast it early for what your mana allows: a clean answer to a mana dork, a chump, a fragile two-toughness threat. Draw it deep into a game and the kicker scales it up to four damage, enough to clear most of what a creature deck actually wants to protect, which is exactly the range a plain Shock never reaches. The reward for the deck slot is that flexibility across the arc of a game: it asks nothing to be castable on turn one and still lines up against the curve on turn ten, when the rest of your cheap burn has stopped connecting with anything relevant. The damage only ever points at a creature, never a player or a planeswalker, so it stays a disciplined fair-deck answer rather than a reach spell. The kicker is a dial rather than a mode: same card, two settings, one to spend when mana is tight and one to spend when it is flush.