The Thousand Flames pressed down the energy storm, burning at it from every side. The Primordial Flames flooded the still-imploding dot, messing with the process and consuming the accumulated world energy before it could reach the critical point.
The explosion was unavoidable, but when it finally happened, part of the energy mass had been consumed and it had to fight through a thick layer of Thousands and Primordial Flames to advance.
The energy mass found no world energy to absorb and amplify to further increase its destructive power because the Hands of Menadion had focused it all to fuel the Flames.
Despite all that, the collapsing power core managed to burst through the sea of fire with enough strength left to kill the fusion between Lith and Solus.