Chant of Vitu-Ghazi

The Fog that asks to be a defensive keystone rather than a delay tactic. Most damage-prevention spells buy a turn and nothing else; this one converts the entire combat step into a life swing, gaining you back every point the attack would have dealt. Against a wide aggressive board, the prevented damage and the life gained scale together, so the bigger the swing your opponent commits to, the harder the spell punishes the overextension. Convoke is what reconciles the rate with the reality of when you want to cast it: at eight mana value this would never come down in time to matter, but the tokens and bodies a defensive deck has already deployed can tap to crash the price down, often to a handful of mana or less on a stalled board. That creates an unusual tension for a fog effect, which normally wants you holding mana up while doing nothing else: here the creatures you would otherwise be racing with become the resource that pays for the wall. The cost wants a clogged battlefield, not an empty one, turning a stalemate into a one-sided lifegain blowout precisely when the attacker thinks they have found their lethal turn.