I don't know which mod add it :-/What mod added a ender cake that lets you go to the end? I want to say Ex Nilo. I know it's not in this pack anymore but to bad there wasn't a mod just for that. Can I ask why the End and Nether are off limits in this pack?
For now, I don't want to complicate things... I probably change that in the future, I've some plans for that! I know that you have to kill a wither SPOILER but going to the Nether and to the End is adding more unneeded challenges to the game! That's my opinion, but I'm able to change it like I said, in the future I might change it!