Suppose I have vulnerable 5 fire on a monster and I hit it with a basic melee attack. This melee attack comes with an extra 3 fire damage from Swordmage's Burning Blade, and an extra 1d4 fire damage ...
In a recent encounter there were creatures with vulnerability to burst attacks. One character used an attack that had the range 'Close Burst 10', and target 'One Creature'. The DM defined this as a ...