Clinging Mists

A Fog with a clause that turns desperation into a counterstrike. The baseline effect is the oldest defensive tool in green's kit: blank one combat step, buy a turn, untangle from an alpha strike. What the fateful hour rider does is convert the low-life-total weakness that usually invites that alpha strike into the trigger condition for a real tempo swing. At five life or less the spell still erases the damage, but it also taps every attacker and denies them their next untap step: the aggressor who overcommitted to close the game out hands you a turn cycle where their board is locked sideways and yours is free to act. The structural irony is precise. Fateful hour cards reward you for being nearly dead, so the card is best exactly when the opponent thinks they have won, and the worse your position the more value the same three mana buys. It is a defensive spell that punishes the act of attacking, an inversion of the usual Fog math where the caster simply stalls. The cost of that upside is the threshold itself: above five life this is a vanilla turn-skipper with no extra reach, so the card only pays out when you have already let the race get genuinely dangerous, which is the kind of brinkmanship green rarely wants to be planning around.