Plugin category: World Generators/Editors Suggested name: BlockSwitch? What I want: I've found almost exactly what I need in github.com/NuclearW/NoMobSpawners But, it only Removes the items on startup, and for some reason the new version doesn't work, as it was supposed to fix a bug with the spawn area. So the premise is: Change all of a list of blocks into another type, when the server starts, and only on loaded chunks. New chunks don't need to be affected. I'll be using worldBorder to generate them beforehand. Config Example: #Worlds to edit, separate with commas. Leave blocks-strip empty if you don't want any changed, otherwise separate the blocks you want with commas. #Tue Aug 21 21:20:14 PDT 2012 active-worlds=world #not a required feature blocks-strip=2,17,18 block-replace=49 #changes grass, log, and leaf into obsidian. Error if there is more than one block-replace, for simplicity. If you want to code a percent chance based on the quantity, that's personal. Ideas for commands: No commands needed, just the start button and config. Ideas for permissions: None needed. When I'd like it by: Whenever you can, I left that github link up in case it could help inspire. I tried editing just one section so setTypeId(0) changes to setTypeId(49) but it just didn't work, so I'd suggest coding from scratch using that for a reference, rather than trying to clone the git repo. Thank you for any effort, and I wouldn't use Worldedit or VoxelSniper, because I'm talking about an entire world, top to bottom, not just one or two chunks in specified places.