Check out the remake!
This is a data pack/mod that makes reaching the End a lot more of a late game task, making it much more challenging to obtain by changing the crafting recipe for the Eye of Ender. This mod was inspired by deepore's "Endgame Dragon" mod.
I recommend using some mods to spice up the End and make it worth the challenge.
Q: Can I use this in my modpack?
A: Of course! This mod was meant for modpacks!
Q: Can I redistrubute this?
A: Unless you're in a third-world country, no.
Q: There's a bug, how can I report it?
A: This version is no longer receiving updates, check out the remake!