Using:
Minecrack pack 8.2
Minecraft 1.4.7
mystcraft-uni-1.4.6-0.9.5.0.0
I generated a new age with a brand new descriptive book under the conditions that it is a mushroom biome with standard terrain, and crystals. However, it made me a Twilight Forest realm. I have already made a portal to the Twilight Forest, but never went into it yet. I do not know if this is supposed to happen under an odd circumstance, but I was under the impression that you need a Twilight Portal to get to the realm for the first time.
It should be noted that the age had trouble loading the spawn for a few seconds. The console text is below:
Spoiler
2013-04-28 02:57:08 [INFO] [Minecraft] Saving and pausing game... 2013-04-28 02:57:08 [INFO] [Minecraft] Saving chunks for level 'New World'/Overworld 2013-04-28 02:57:08 [INFO] [Minecraft] Saving chunks for level 'New World'/Nether 2013-04-28 02:57:08 [INFO] [Minecraft] Saving chunks for level 'New World'/(54) Mob Grinder 2013-04-28 02:58:06 [INFO] [Minecraft] Saving and pausing game... 2013-04-28 02:58:06 [INFO] [Minecraft] Saving chunks for level 'New World'/Overworld 2013-04-28 02:58:06 [INFO] [Minecraft] Saving chunks for level 'New World'/Nether 2013-04-28 02:58:06 [INFO] [Minecraft] Saving chunks for level 'New World'/(54) Mob Grinder 2013-04-28 02:59:17 [INFO] [Minecraft] Saving and pausing game... 2013-04-28 02:59:17 [INFO] [Minecraft] Saving chunks for level 'New World'/Overworld 2013-04-28 02:59:17 [INFO] [Minecraft] Saving chunks for level 'New World'/Nether 2013-04-28 02:59:17 [INFO] [Minecraft] Saving chunks for level 'New World'/(54) Mob Grinder 2013-04-28 03:00:36 [INFO] [Minecraft] Saving and pausing game... 2013-04-28 03:00:36 [INFO] [Minecraft] Saving chunks for level 'New World'/Overworld 2013-04-28 03:00:36 [INFO] [Minecraft] Saving chunks for level 'New World'/Nether 2013-04-28 03:00:36 [INFO] [Minecraft] Saving chunks for level 'New World'/(54) Mob Grinder 2013-04-28 03:02:16 [INFO] [Minecraft] Saving and pausing game... 2013-04-28 03:02:16 [INFO] [Minecraft] Saving chunks for level 'New World'/Overworld 2013-04-28 03:02:16 [INFO] [Minecraft] Saving chunks for level 'New World'/Nether 2013-04-28 03:02:16 [INFO] [Minecraft] Saving chunks for level 'New World'/(54) Mob Grinder 2013-04-28 03:03:37 [INFO] [Minecraft] Saving and pausing game... 2013-04-28 03:03:37 [INFO] [Minecraft] Saving chunks for level 'New World'/Overworld 2013-04-28 03:03:37 [INFO] [Minecraft] Saving chunks for level 'New World'/Nether 2013-04-28 03:03:37 [INFO] [Minecraft] Saving chunks for level 'New World'/(54) Mob Grinder 2013-04-28 03:03:54 [INFO] [Minecraft] Saving and pausing game... 2013-04-28 03:03:54 [INFO] [Minecraft] Saving chunks for level 'New World'/Overworld 2013-04-28 03:03:54 [INFO] [Minecraft] Saving chunks for level 'New World'/Nether 2013-04-28 03:03:54 [INFO] [Minecraft] Saving chunks for level 'New World'/(54) Mob Grinder 2013-04-28 03:04:53 [INFO] [Minecraft] Saving and pausing game... 2013-04-28 03:04:53 [INFO] [Minecraft] Saving chunks for level 'New World'/Overworld 2013-04-28 03:04:53 [INFO] [Minecraft] Saving chunks for level 'New World'/Nether 2013-04-28 03:04:53 [INFO] [Minecraft] Saving chunks for level 'New World'/(54) Mob Grinder 2013-04-28 03:06:23 [INFO] [Minecraft] Saving and pausing game... 2013-04-28 03:06:23 [INFO] [Minecraft] Saving chunks for level 'New World'/Overworld 2013-04-28 03:06:23 [INFO] [Minecraft] Saving chunks for level 'New World'/Nether 2013-04-28 03:06:23 [INFO] [Minecraft] Saving chunks for level 'New World'/(54) Mob Grinder 2013-04-28 03:09:01 [INFO] [ForgeModLoader] Loading dimension 172 (New World) (bdz@101c6123) 2013-04-28 03:09:01 [INFO] [STDOUT] Unable to find spawn biome 2013-04-28 03:09:02 [INFO] [STDOUT] Unable to find spawn biome 2013-04-28 03:09:21 [INFO] [STDOUT] Sending serverside check to: <removed> 2013-04-28 03:09:21 [INFO] [STDOUT] Loading World: local/New World (survival) 2013-04-28 03:09:21 [WARNING] [Minecraft] Can't keep up! Did the system time change, or is the server overloaded? 2013-04-28 03:09:23 [INFO] [STDERR] Exception in thread "Thread-32" java.lang.NullPointerException 2013-04-28 03:09:23 [INFO] [STDERR] at zz.d(Chunk.java:1286) 2013-04-28 03:09:23 [INFO] [STDERR] at yc.h(World.java:1953) 2013-04-28 03:09:23 [INFO] [STDERR] at com.thevoxelbox.voxelmap.VoxelMap.getTransparentHeight(VoxelMap.java:1652) 2013-04-28 03:09:23 [INFO] [STDERR] at com.thevoxelbox.voxelmap.VoxelMap.getPixelColor(VoxelMap.java:1449) 2013-04-28 03:09:23 [INFO] [STDERR] at com.thevoxelbox.voxelmap.VoxelMap.renderChunk(VoxelMap.java:1286) 2013-04-28 03:09:23 [INFO] [STDERR] at com.thevoxelbox.voxelmap.util.MapChunk.drawChunk(MapChunk.java:57) 2013-04-28 03:09:23 [INFO] [STDERR] at com.thevoxelbox.voxelmap.util.MapChunkCache.drawChunks(MapChunkCache.java:125) 2013-04-28 03:09:23 [INFO] [STDERR] at com.thevoxelbox.voxelmap.VoxelMap.run(VoxelMap.java:586) 2013-04-28 03:09:23 [INFO] [STDERR] at java.lang.Thread.run(Unknown Source) 2013-04-28 03:09:26 [WARNING] [Minecraft] Can't keep up! Did the system time change, or is the server overloaded? 2013-04-28 03:09:49 [WARNING] [Minecraft] Can't keep up! Did the system time change, or is the server overloaded? 2013-04-28 03:10:24 [INFO] [Minecraft] Saving and pausing game... 2013-04-28 03:10:24 [INFO] [Minecraft] Saving chunks for level 'New World'/Overworld 2013-04-28 03:10:24 [INFO] [Minecraft] Saving chunks for level 'New World'/Nether 2013-04-28 03:10:24 [INFO] [Minecraft] Saving chunks for level 'New World'/(54) Mob Grinder 2013-04-28 03:10:24 [INFO] [Minecraft] Saving chunks for level 'New World'/(172) Crystals 2013-04-28 03:22:19 [INFO] [Minecraft] Saving and pausing game... 2013-04-28 03:22:19 [INFO] [Minecraft] Saving chunks for level 'New World'/Overworld 2013-04-28 03:22:19 [INFO] [Minecraft] Saving chunks for level 'New World'/Nether 2013-04-28 03:22:19 [INFO] [Minecraft] Saving chunks for level 'New World'/(54) Mob Grinder 2013-04-28 03:22:19 [INFO] [Minecraft] Saving chunks for level 'New World'/(172) Crystals 2013-04-28 03:22:20 [INFO] [ForgeModLoader] [THAUMCRAFT] Restoring client configs. 2013-04-28 03:22:20 [INFO] [Minecraft] Stopping server 2013-04-28 03:22:20 [INFO] [Minecraft] Saving players 2013-04-28 03:22:20 [INFO] [STDOUT] Unloading Player: <removed> 2013-04-28 03:22:20 [INFO] [STDERR] java.lang.IllegalArgumentException: Could not get provider type for dimension 172, does not exist 2013-04-28 03:22:20 [INFO] [STDERR] at net.minecraftforge.common.DimensionManager.getProviderType(DimensionManager.java:150) 2013-04-28 03:22:20 [INFO] [STDERR] at net.minecraftforge.common.DimensionManager.shouldLoadSpawn(DimensionManager.java:265) 2013-04-28 03:22:20 [INFO] [STDERR] at im.b(ChunkProviderServer.java:72) 2013-04-28 03:22:20 [INFO] [STDERR] at il.b(PlayerInstance.java:82) 2013-04-28 03:22:20 [INFO] [STDERR] at ik.c(SourceFile:265) 2013-04-28 03:22:20 [INFO] [STDERR] at gm.e(ServerConfigurationManager.java:232) 2013-04-28 03:22:20 [INFO] [STDERR] at iv.c(NetServerHandler.java:169) 2013-04-28 03:22:20 [INFO] [STDERR] at gm.r(ServerConfigurationManager.java:910) 2013-04-28 03:22:20 [INFO] [STDERR] at net.minecraft.server.MinecraftServer.k(MinecraftServer.java:402) 2013-04-28 03:22:20 [INFO] [STDERR] at bdz.k(IntegratedServer.java:231) 2013-04-28 03:22:20 [INFO] [STDERR] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:550) 2013-04-28 03:22:20 [INFO] [STDERR] at fy.run(SourceFile:849) [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 0 enUS to options pane [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 1 cyGB to options pane [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 2 daDK to options pane [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 3 deDE to options pane [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 4 esES to options pane [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 5 frFR to options pane [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 6 itIT to options pane [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 7 maHU to options pane [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 8 nlNL to options pane [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 9 ptBR to options pane [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 10 ptPT to options pane [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 11 ruRU to options pane [03:22:37] [INFO] OptionsPane.<init>:157: [i18n] Added 12 svSE to options pane [03:22:37] [INFO] I18N.setLocale:157: [i18n] enUS English language file loaded!