Fog of War

Fog effects have always priced themselves on one axis: how completely they blank the combat step. The original Fog stops everything for a lone green mana; this one trades some of that reach for a power ceiling. Prevention only reaches creatures with power 3 or less, making it a wall against go-wide swarms and token armies rather than a blanket answer to the big beaters green most fears. That narrowing pairs cleanly with the second clause: life equal to every creature in play, yours and theirs alike. Both halves point the same direction. The wider and smaller the opposing board, the more damage you turn off and the more life you bank, so the card scales with exactly the matchup it was built to punish: aggressive decks flooding the table with cheap bodies. The synergy is the point, not a tension. Against three fatties it prevents nothing and gains a handful of life; against a field of one- and two-power attackers it walls the entire assault while swinging the life total by a dozen or more. Read it as an anti-aggro tempo tool that happens to fog: hold it at instant speed and cash it the turn the opponent overcommits, converting their board development into your lifegain. It is a fog with an opinion about who it wants pointed at.