All three new plot dungeons are up. GOGOGOGO http://forums.hyrulecastle.org/index.php?threads/not-the-end-by-any-means.2661/
Quick addition to my announcement. Just wanted to let everyone know that I left a lot of things intentionally vague with these dungeons: even with the things that I've already set down, feel free to message me, if you think you have a better idea for your own dungeon, and we can talk about it!
