where is the badge for Malavon does anyone know where he is thanks

After you go through the initial entrance to the lava caves, at the top in the middle is a door. Through that door, there is a garden looking room with a bunch of mushrooms and skeletons. The first door on the left goes into a boarded up town. At the far end there is a door to Malavon's area. He is tough. I wont ruin the fun for you though.