Overworld in flames - book 2

When fire ravages the plains of Minecraft, Gameknight999 must trace the mysterious flames back to their deadly source!
The spider queen and the king of the skeletons were both destroyed, but not before hinting to Gameknight999 that the command blocks they guarded were not the only traps Herobrine had set before he was deleted.
The inhabitants of the Overworld barely had any time to celebrate their victory when the fires started occurring. Flames were devouring more land with every tick of the CPU. The User-that-is-not-a-user knew something was terribly wrong. He also knew who was responsible.
With the fires growing both in size and frequency, entire villages were reduced to piles of smoldering ash. Entire biomes followed. But unlike before, there were no mocking signs or arrogant clues for Gameknight and his friends to follow. Only a single blaze rod was found in the rubble. But if this was the work of monsters from the Nether, where was the portal? And how...