The crash-report is spammed with Code: at net.minecraft.world.chunk.Chunk.func_150806_e(Chunk.java:842) at net.minecraft.world.World.func_147438_o(World.java:2540) at thaumcraft.common.blocks.BlockWarded.getBlock(BlockWarded.java:109) at thaumcraft.common.blocks.BlockWarded.isNormalCube(BlockWarded.java:269) at net.minecraft.world.World.func_147453_f(World.java:3876) at net.minecraft.world.World.func_147455_a(World.java:2603) No coordinates either :/ Did you use warded glass, or did you manually ward blocks with a wand? Warded glass would be easy to remove, but regular blocks that are warded would be much harder to remove.
I tried to help him earlier - and a few of the crash reports end with EIO conduits running updateNeighbors. I have no idea what was happening though, so I pointed him here. From my conversation with him, its regular, standard blocks, warded with a wand